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JP5879091B2 - Combined thermal power generation system - Google Patents

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JP5879091B2
JP5879091B2 JP2011233079A JP2011233079A JP5879091B2 JP 5879091 B2 JP5879091 B2 JP 5879091B2 JP 2011233079 A JP2011233079 A JP 2011233079A JP 2011233079 A JP2011233079 A JP 2011233079A JP 5879091 B2 JP5879091 B2 JP 5879091B2
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hydrogen production
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JP2013091577A (en
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匠磨 森
匠磨 森
日数谷　進
進 日数谷
なおえ 日野
なおえ 日野
香奈 清水
香奈 清水
山本　誠吾
誠吾 山本
亜美 西
亜美 西
敦 和久井
敦 和久井
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Kanadevia Corp
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Hitachi Zosen Corp
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    • 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
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
    • 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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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Description

本発明は、火力発電設備における燃焼に伴って発生する窒素酸化物（以下ＮＯｘ）の大気への排出を低減させることができる複合型発電システムに関する。   The present invention relates to a combined power generation system that can reduce the emission of nitrogen oxides (hereinafter referred to as NOx) generated with combustion in a thermal power generation facility to the atmosphere.

火力発電設備において、燃料燃焼時には燃料含有窒素Ｎ成分に起因するフューエルＮＯｘ、窒素存在（空気）雰囲気下における高温燃焼に起因するサーマルＮＯｘが発生する。ＮＯｘは酸性雨の原因となることやその毒性などから排出抑制が望まれ、排出規制が設けられているガスである。   In a thermal power generation facility, fuel NOx resulting from fuel-containing nitrogen N component and thermal NOx resulting from high-temperature combustion in a nitrogen presence (air) atmosphere are generated during fuel combustion. NOx is a gas for which emission control is desired because it causes acid rain and its toxicity, and has emission regulations.

ＮＯｘ発生を低減させるために、例えば、燃料燃焼条件を低温にするなどして調節し燃焼効率を少し低下させて対応するなど、様々な対策がとられている（非特許文献１、２）。   In order to reduce the generation of NOx, various measures are taken, for example, by adjusting the fuel combustion condition by lowering the temperature to reduce the combustion efficiency (Non-Patent Documents 1 and 2).

東京電力、“環境への取り組み、大気汚染対策−窒素酸化物（ＮＯｘ）対策−”、［online］、平成２１年９月３０日［平成２３年１０月２４日検索］、インターネット〈URL:http://www.tepco.co.jp/tp/eco/nox/index-j.html〉TEPCO, “Environmental Initiatives, Air Pollution Countermeasures—Nitrogen Oxide (NOx) Countermeasures”, [online], September 30, 2009 [October 24, 2011 search], Internet <URL: http : //www.tepco.co.jp/tp/eco/nox/index-j.html> “窒素酸化物削減に関する技術リスト”、平成２２年３月［平成２３年１０月２４日検索］、インターネット〈URL:http://www.env.go.jp/air/tech/ine/asia/china/files/needs/china-technology-list-jp.pdf〉“Technology List on Nitrogen Oxide Reduction”, March 2010 [searched on October 24, 2011], Internet <URL: http://www.env.go.jp/air/tech/ine/asia/ china / files / needs / china-technology-list-jp.pdf>

火力発電設備から排出されるＮＯｘを原料として有効利用することができれば、同時にＮＯｘの排出の抑制も図ることができるので、そのシステムは理想的である。   If NOx discharged from a thermal power generation facility can be effectively used as a raw material, it is possible to suppress NOx emission at the same time, so that the system is ideal.

本発明は、上記事情に鑑みてなされたものであり、火力発電設備からのＮＯｘ排出を抑制することができる複合型火力発電システムを提供することを目的とする。   This invention is made | formed in view of the said situation, and it aims at providing the combined thermal power generation system which can suppress NOx discharge | emission from a thermal power generation equipment.

上記課題を解決するため、本発明の複合型火力発電システムは、火力発電設備と、水分解光触媒水素製造設備と、該火力発電設備から排出されるＮＯｘと必要に応じて導かれる窒素、および該水分解光触媒水素製造設備で生成する水素を原料として利用してアンモニアを合成する化学合成設備とを有することを特徴とするものである。   In order to solve the above problems, a combined thermal power generation system of the present invention includes a thermal power generation facility, a water-splitting photocatalytic hydrogen production facility, NOx discharged from the thermal power generation facility, nitrogen introduced as necessary, and the And a chemical synthesis facility for synthesizing ammonia by using hydrogen generated in the water-splitting photocatalytic hydrogen production facility as a raw material.

上記複合型火力発電システムにおいて、好ましくは、前記火力発電設備からの排出蒸気を熱源として利用する海水淡水化設備をさらに有し、該海水淡水化設備で製造された水が前記水分解光触媒水素製造設備に供給される。   Preferably, the combined thermal power generation system further includes a seawater desalination facility that uses exhaust steam from the thermal power generation facility as a heat source, and water produced by the seawater desalination facility is the water-splitting photocatalytic hydrogen production Supplied to the facility.

好ましくは、前記化学合成設備で副生成する水が、前記水分解光触媒水素製造設備に供給される。   Preferably, water by-produced in the chemical synthesis facility is supplied to the water splitting photocatalytic hydrogen production facility.

本発明の複合型火力発電システムでは、化学合成設備において、火力発電設備から排出されるＮＯｘと必要に応じて導かれる窒素、および該水分解光触媒水素製造設備で生成する水素を原料として利用してアンモニアが合成される。アンモニアは貯蔵・輸送されて、別途有効に利用される。本発明では、火力発電設備で排出されるＮＯｘをアンモニア合成の原料とすることが可能となり、ＮＯｘを排出しないクリーンな複合型火力発電システムを形成することができる。また、本発明では、ＮＯｘのＮ成分がアンモニアとなり化学エネルギーとして有効に利用される。さらに、本発明のシステムを構築することで火力発電設備において排ガス脱硝設備が不要となり、設備のコンパクト化に繋がる。   In the combined thermal power generation system of the present invention, in the chemical synthesis facility, NOx discharged from the thermal power generation facility, nitrogen introduced as necessary, and hydrogen generated in the water splitting photocatalytic hydrogen production facility are used as raw materials. Ammonia is synthesized. Ammonia is stored and transported for effective use separately. In the present invention, NOx discharged from the thermal power generation facility can be used as a raw material for ammonia synthesis, and a clean combined thermal power generation system that does not discharge NOx can be formed. In the present invention, the N component of NOx becomes ammonia and is effectively used as chemical energy. Furthermore, the construction of the system of the present invention eliminates the need for exhaust gas denitration equipment in the thermal power generation equipment, leading to downsizing of the equipment.

火力発電設備で使用する燃料の違い（ＬＮＧ、石炭）による排出ＮＯｘ成分および量の差異は、その発電設備の規模を変更することで対応し、また必要量の窒素を適宜追加することにより、生成水素量を全量アンモニアに変換することが可能である。   The difference in NOx composition and quantity due to the difference in fuel used in thermal power generation equipment (LNG, coal) can be dealt with by changing the scale of the power generation equipment, and it can be generated by adding the required amount of nitrogen as appropriate. It is possible to convert the total amount of hydrogen to ammonia.

また、化学合成設備で副生成する水は、上流の水分解光触媒水素製造設備に供給されて有効に再利用される。   In addition, water produced as a by-product in the chemical synthesis facility is supplied to the upstream water-splitting photocatalytic hydrogen production facility and effectively reused.

場合（設置環境）によっては海水炭水化設備が不要となり、当該設備のコンパクトが可能となる。   Depending on the case (installation environment), the seawater charcoal liquefaction facility becomes unnecessary, and the facility can be made compact.

ＮＯｘは全量がアンモニア原料として利用され得るため、サーマルＮＯｘ発生を低減させるための低温燃料などの工夫は不要となり、発電設備において燃料の燃焼効率を向上させることが可能となる。   Since the entire amount of NOx can be used as an ammonia raw material, a device such as a low-temperature fuel for reducing the generation of thermal NOx is not required, and the combustion efficiency of fuel can be improved in the power generation facility.

実施の形態１の複合型火力発電システムを説明するフローシートである。2 is a flow sheet for explaining the combined thermal power generation system of the first embodiment. コンバインドサイクル火力発電設備を説明する内部概略図である。It is an internal schematic diagram explaining a combined cycle thermal power generation facility. 水分解光触媒水素製造設備（２）を示す概略図である。It is the schematic which shows a water-splitting photocatalytic hydrogen production facility (2). 実施の形態２の複合型火力発電システムを説明するフローシートである。3 is a flow sheet for explaining a combined thermal power generation system according to a second embodiment.

以下、本発明の複合型火力発電システムについて詳細に説明する。   Hereinafter, the combined thermal power generation system of the present invention will be described in detail.

（実施の形態１）
図１は、実施の形態１の複合型火力発電システムを説明するフローシートである。 (Embodiment 1)
FIG. 1 is a flow sheet illustrating the combined thermal power generation system according to the first embodiment.

本実施の形態１の複合型火力発電システムは、火力発電設備（１）と、水分解光触媒水素製造設備（２）と、化学合成設備（３）とを有し、化学合成設備（３）は、火力発電設備（１）から排出されるＮＯｘと必要に応じて導かれる窒素、および水分解光触媒水素製造設備（２）で生成する水素を原料として利用してアンモニアを合成する。   The combined thermal power generation system of Embodiment 1 includes a thermal power generation facility (1), a water splitting photocatalytic hydrogen production facility (2), and a chemical synthesis facility (3). Then, ammonia is synthesized using NOx discharged from the thermal power generation facility (1), nitrogen introduced as necessary, and hydrogen produced in the water splitting photocatalytic hydrogen production facility (2) as raw materials.

火力発電設備（１）として、例えば、燃料を燃焼させたガスでタービンを回転させるガスタービンと、燃料燃焼の排熱回収ボイラで生成した蒸気でタービンを回転させる蒸気タービンとを有するコンバインドサイクル火力発電が挙げられる。なお、以降の実施の形態２とは異なり、本実施の形態１では、火力発電設備で排出されるＮＯｘおよび発生した電力のみを利用する構成であるので、火力発電設備（１）における蒸気の利用は必須ではない。   As the thermal power generation facility (1), for example, a combined cycle thermal power generation including a gas turbine that rotates a turbine with gas obtained by burning fuel and a steam turbine that rotates the turbine with steam generated by a waste heat recovery boiler for fuel combustion Is mentioned. Note that unlike Embodiment 2 below, Embodiment 1 is configured to use only NOx discharged from the thermal power generation facility and the generated electric power, so that steam is used in the thermal power generation facility (1). Is not required.

図２は、コンバインドサイクル火力発電設備を説明する内部概略図である。   FIG. 2 is an internal schematic diagram illustrating a combined cycle thermal power generation facility.

コンバインドサイクル火力発電システムは、発電機（１１）と、ガスタービン（１２）と、蒸気タービン（１３）とを有し、ガスタービン（１２）には、空気圧縮機（１４）からの圧縮空気と燃料（例えばＬＮＧ、石油など）とが導入され、燃料の燃焼によりガスタービン（１２）が回転し、この回転により発電機（１１）にて発電する。燃料燃焼後に生じるガスタービン（１２）からの排気は、排熱回収ボイラ（１５）に送られ、ここで、別途取り込んだ海水などとの熱交換により冷却され、脱硫・ＣＯ２除去装置（１６）に送られる。 The combined cycle thermal power generation system includes a generator (11), a gas turbine (12), and a steam turbine (13). The gas turbine (12) includes compressed air from an air compressor (14). Fuel (for example, LNG, petroleum, etc.) is introduced, and the gas turbine (12) is rotated by the combustion of the fuel, and the generator (11) generates electric power by this rotation. Exhaust gas from the gas turbine (12) generated after fuel combustion is sent to an exhaust heat recovery boiler (15), where it is cooled by heat exchange with separately taken seawater and the like, and desulfurization / CO 2 removal device (16) Sent to.

脱硫・ＣＯ２除去装置（１６）における排出ガスからのＮＯｘ分離は、アルカリ吸収方式、酸素燃焼方式などを用いて行われる（http:/www.hitachiyoron.com/2008/05/pdf/05a0.4.pdf参照）。アルカリ吸収方式は、排出ガス中のＣＯ２をアミンなどのアルカリ吸収液に吸収させる方式である。アルカリ吸収液に吸収させられたＣＯ２は加熱することにより高濃度に回収され、同時にアルカリ吸収液が再生される。酸素燃焼方式は、燃料（石炭など）を酸素で燃焼させて排ガスを循環させつつ、燃焼に必要な酸素を供給することでＣＯ２と水分を主成分とする排ガス組成とし、ＣＯ２を圧縮・回収する方式である。 The NOx separation from the exhaust gas in the desulfurization / CO 2 removal device (16) is performed using an alkali absorption method, an oxyfuel combustion method, or the like (http: /www.hitachiyoron.com/2008/05/pdf/05a0.4). see .pdf). The alkali absorption method is a method in which CO 2 in the exhaust gas is absorbed by an alkali absorption liquid such as amine. The CO 2 absorbed in the alkali absorbing solution is recovered to a high concentration by heating, and at the same time, the alkali absorbing solution is regenerated. Oxyfuel combustion system, while fuel by burning (such as coal) with oxygen by circulating exhaust gas, and exhaust gas composition to the CO 2 and water as a main component by supplying oxygen necessary for combustion, and compression of CO 2 It is a method to collect.

脱硫・ＣＯ２除去装置（１６）を通過した後、排ガスは、発電設備から排気される。この排気は、ＮＯｘを含んでいる。また、排熱回収ボイラ（１５）に供給された海水などの水は、熱交換により蒸気となり、蒸気タービン（１３）に送られて、蒸気タービン（１３）を回転させ、その後、蒸気の状態で発電設備から出る。 After passing through the desulfurization / CO 2 removal device (16), the exhaust gas is exhausted from the power generation facility. This exhaust contains NOx. Further, water such as seawater supplied to the exhaust heat recovery boiler (15) is converted into steam by heat exchange and sent to the steam turbine (13) to rotate the steam turbine (13), and then in the state of steam. Get out of the power generation facility.

水分解光触媒水素製造設備（２）は、太陽光と光触媒の作用により水を水素と酸素に分解する設備である。   The water splitting photocatalytic hydrogen production facility (2) is a facility that decomposes water into hydrogen and oxygen by the action of sunlight and a photocatalyst.

図３に水分解光触媒水素製造設備（２）の概略図を示す。   FIG. 3 shows a schematic diagram of the water-splitting photocatalytic hydrogen production facility (2).

水分解光触媒水素製造設備（２）は、上部の陽極室（２１）と、この陽極室（２１）に一端側にて連結する下部の陰極室（２２）とを備えている。陽極室（２１）には、太陽光により酸素を生成させる触媒作用を有する陽極光触媒（例えば、ＴａＯＮ、Ｔａ３Ｎ５、ＴｉＯ２−ｘＮｘ、ＢｉＶＯ４、ＷＯ３など）（２３）が備えられ、陰極室（２２）には、水素を生成させる触媒作用を有する陰極触媒（例えば、Ｐｔなど）（２４）が備えられている。 The water-splitting photocatalytic hydrogen production facility (2) includes an upper anode chamber (21) and a lower cathode chamber (22) connected to the anode chamber (21) at one end side. The anode chamber (21), the anode photocatalyst having a catalytic action to produce oxygen by sunlight (e.g., TaON, Ta 3 N 5, TiO 2-x N x, etc. BiVO 4, WO 3) (23) is provided The cathode chamber (22) is provided with a cathode catalyst (for example, Pt) (24) having a catalytic action for generating hydrogen.

水は、一端側上端から陽極室（２１）に導入され、一端側の連通路から陰極室（２２）に通り、他端側下端を介して水分解光触媒水素製造設備から出る。   Water is introduced into the anode chamber (21) from the upper end on one end side, passes from the communication path on one end side to the cathode chamber (22), and exits from the water-splitting photocatalytic hydrogen production facility via the lower end on the other end side.

発電設備からの電力が電源（２５）に供給され、太陽光が照射されると、陽極光触媒（２３）の触媒作用により、酸素が発生する。発生した酸素は、陽極室（２１）中央部上端に設けられた通気孔（２６）から排出される。また、陰極室（２２）では、陰極触媒（２４）の触媒作用により、水素が発生する。発生した水素は、陰極室（２２）中央部の所定区間に設けられた区画（２７）を経て、陰極室（２２）の他端側から排出される。   When electric power from the power generation facility is supplied to the power source (25) and irradiated with sunlight, oxygen is generated by the catalytic action of the anode photocatalyst (23). The generated oxygen is discharged from a vent hole (26) provided at the upper center of the anode chamber (21). In the cathode chamber (22), hydrogen is generated by the catalytic action of the cathode catalyst (24). The generated hydrogen is discharged from the other end side of the cathode chamber (22) through a section (27) provided in a predetermined section at the center of the cathode chamber (22).

化学合成設備（３）には、火力発電設備（１）からのＮＯｘおよび電力が供給され、水分解光触媒水素製造設備（２）から水素が供給され、これらを原料としてアンモニアが合成される。反応に用いられる触媒は、Ｆｅ系の触媒であり、ＮＯｘとしてＮＯ２、ＮＯおよびＮ２Ｏを想定した場合の反応式は、以下の（１）〜（３）の通りである。 The chemical synthesis facility (3) is supplied with NOx and electric power from the thermal power generation facility (1), supplied with hydrogen from the water splitting photocatalytic hydrogen production facility (2), and ammonia is synthesized using these as raw materials. The catalyst used for the reaction is an Fe-based catalyst, and the reaction formulas assuming NO 2 , NO, and N 2 O as NOx are as follows (1) to (3).

２ＮＯ ＋ ５Ｈ２ → ２ＮＨ３ ＋ ２Ｈ２Ｏ ・・・（１）
２ＮＯ２ ＋ ７Ｈ２ → ２ＮＨ３ ＋ ４Ｈ２Ｏ ・・・（２）
Ｎ２Ｏ ＋ ４Ｈ２ → ２ＮＨ３ ＋ Ｈ２Ｏ ・・・（３）
この反応における副生成物である水は、水分解光触媒水素製造設備（２）に再利用されてもよい。 2NO + 5H 2 → 2NH 3 + 2H 2 O (1)
2NO 2 + 7H 2 → 2NH 3 + 4H 2 O (2)
N 2 O + 4H 2 → 2NH 3 + H 2 O (3)
Water that is a by-product in this reaction may be reused in the water-splitting photocatalytic hydrogen production facility (2).

次に、本実施形態１の複合型火力発電システムを用いた場合について実施例１として具体的に説明する。   Next, the case where the combined thermal power generation system of the first embodiment is used will be specifically described as Example 1.

（実施例１）
火力発電設備（１）として、コンバインドサイクル火力発電設備を用いた。高位発熱量ベース（ＨＨＶ基準）の発電効率は５０％であり、火力発電燃料として液化天然ガス（ＬＮＧ）、石油などを用いた。発電規模（出力）は２５０ＭＷであった。 Example 1
A combined cycle thermal power generation facility was used as the thermal power generation facility (1). The power generation efficiency based on the higher heating value (HHV standard) was 50%, and liquefied natural gas (LNG), petroleum, etc. were used as the thermal power generation fuel. The power generation scale (output) was 250 MW.

水分解光触媒水素製造設備（２）について、太陽エネルギー変換効率は４％、設備（光触媒電極）面積は２８，０００ｍ２（例えば５ｋｍ×５．６ｋｍ）、場内消費電力量：２×１０６ｋＷｈ／ｄａｙ、水素製造規模（出力）：３５０ｔ／ｄａｙ−Ｈ２とした。 Regarding the water-splitting photocatalytic hydrogen production facility (2), the solar energy conversion efficiency is 4%, the facility (photocatalytic electrode) area is 28,000 m 2 (for example, 5 km × 5.6 km), and the power consumption in the field is 2 × 10 6 kWh / Day, hydrogen production scale (output): 350 t / day-H 2 .

日照時間を８ｈと仮定し、ある程度の日射強度（６ｋＷｈ／ｍ２／ｄａｙ）が得られるとすると、水分解光触媒水素製造設備（２）によって昼間３２００ｔの淡水が水素（３５０ｔ）と酸素に分解される。その際に場内で消費される電力量は反応を促進させるための補助的な電力量が主となり２，０００ＭＷｈ／ｄａｙと概算される。 Assuming that the sunshine duration is 8h and that a certain degree of solar radiation intensity (6 kWh / m 2 / day) is obtained, 3200 t of fresh water in the daytime is decomposed into hydrogen (350 t) and oxygen by the water splitting photocatalytic hydrogen production facility (2). The At that time, the amount of power consumed in the field is estimated to be 2,000 MWh / day mainly by an auxiliary power amount for promoting the reaction.

化学合成設備（３）をアンモニア合成設備とし、反応温度：５００℃、反応圧力：２０ＭＰａであり、二重促進鉄を合成触媒に用いた。この合成触媒は、酸化鉄が主成分であり、酸化アルミニウム（シンタリング抑制）と酸化カリウムを含む。本設備におけるアンモニア製造能力は２，０００ｔ／ｄａｙ−ＮＨ３である。 The chemical synthesis facility (3) was an ammonia synthesis facility, the reaction temperature was 500 ° C., the reaction pressure was 20 MPa, and double promoted iron was used as the synthesis catalyst. This synthetic catalyst is composed mainly of iron oxide and contains aluminum oxide (sintering suppression) and potassium oxide. The ammonia production capacity in this facility is 2,000 t / day-NH 3 .

水分解光触媒水素製造設備（２）の水素製造量は、３５０ｔ−Ｈ２／ｄａｙ（つまり１７５×１０６ｍｏｌ−Ｈ２／ｄａｙ）であるため、４０×１０６〜７０×１０６ｍｏｌ−ＮＯｘ／ｄａｙの発生は、その全量をアンモニアに変換可能であると見込まれる。発生ＮＯｘ量が生成水素量に比較して少ない場合は、深冷分離などにより別途精製された窒素を導入することで生成水素全量をアンモニアに変換可能である。 Since the hydrogen production amount of the water-splitting photocatalytic hydrogen production facility (2) is 350 t-H 2 / day (that is, 175 × 10 6 mol-H 2 / day), 40 × 10 6 to 70 × 10 6 mol-NOx. The generation of / day is expected to be able to convert the entire amount into ammonia. When the amount of generated NOx is smaller than the amount of generated hydrogen, the total amount of generated hydrogen can be converted to ammonia by introducing nitrogen that has been separately purified by cryogenic separation or the like.

貯蔵・輸送の観点で課題が多い水素をその場でアンモニアに変換することにより、それをキャリアとして貯蔵・輸送することが可能となる。アンモニアは直接あるいは分解して水素として輸送先のアプリケータで利用される。   By converting hydrogen, which has many problems from the viewpoint of storage and transportation, into ammonia on the spot, it can be stored and transported as a carrier. Ammonia is directly or decomposed and used as hydrogen in the destination applicator.

（実施の形態２）
図４は、実施の形態２の複合型火力発電システムを説明するフローシートである。 (Embodiment 2)
FIG. 4 is a flow sheet for explaining the combined thermal power generation system of the second embodiment.

本実施の形態２の複合型火力発電システムは、火力発電設備（１）と、水分解光触媒水素製造設備（２）と、化学合成設備（３）と、海水淡水化設備（４）とを有し、化学合成設備（３）は、火力発電設備（１）から排出されるＮＯｘおよび水分解光触媒製造設備（２）で生成する水素を原料として利用してアンモニアを合成する。また、海水淡水化設備（４）は、火力発電設備（１）からの排出蒸気を熱源として利用し、海水淡水化設備（４）で製造された淡水が水分解光触媒製造設備（２）に供給される。   The combined thermal power generation system of Embodiment 2 has a thermal power generation facility (1), a water-splitting photocatalytic hydrogen production facility (2), a chemical synthesis facility (3), and a seawater desalination facility (4). The chemical synthesis facility (3) then synthesizes ammonia using the NOx discharged from the thermal power generation facility (1) and the hydrogen produced by the water splitting photocatalyst production facility (2) as raw materials. The seawater desalination facility (4) uses the steam discharged from the thermal power generation facility (1) as a heat source, and the fresh water produced by the seawater desalination facility (4) is supplied to the water-splitting photocatalyst production facility (2). Is done.

火力発電設備（１）、水分解光触媒水素製造設備（２）および化学合成設備（３）は、上記の実施の形態１のものと同様のものであるので、詳細な説明は省略する。   Since the thermal power generation facility (1), the water-splitting photocatalytic hydrogen production facility (2), and the chemical synthesis facility (3) are the same as those in the first embodiment, detailed description thereof is omitted.

海水淡水化設備（４）としては、火力発電設備（１）からの蒸気を熱源として用いて海水から淡水を製造することができるものであれば特に限定はなく、例えば、多段フラッシュ法、多重効用法などを用いた設備が挙げられる。また、海水淡水化設備（４）を駆動するための電力は、火力発電設備（１）から供給される。   The seawater desalination facility (4) is not particularly limited as long as it can produce freshwater from seawater using the steam from the thermal power generation facility (1) as a heat source. For example, the multistage flash method, multiple effects Equipment that uses the law. Electric power for driving the seawater desalination facility (4) is supplied from the thermal power generation facility (1).

海水淡水化設備（４）により製造された淡水は、水分解光触媒水素製造設備（２）に供給される。   Fresh water produced by the seawater desalination facility (4) is supplied to the water-splitting photocatalytic hydrogen production facility (2).

昼間に生成させられる淡水が水分解光触媒水素製造設備（２）に供給されて水素製造に利用される一方で、夜間に生成させられる淡水は飲料などの生活用水や工業用水として有効に利用される。   While fresh water generated in the daytime is supplied to the water-splitting photocatalytic hydrogen production facility (2) and used for hydrogen production, fresh water generated at night is effectively used as domestic water for drinks and industrial water. .

次に、本実施形態２の複合型火力発電システムを用いた場合について実施例２として具体的に説明する。   Next, the case where the combined thermal power generation system of the second embodiment is used will be specifically described as Example 2.

（実施例２）
火力発電設備（１）、水分解光触媒水素製造設備（２）および化学合成設備（３）については実施例１と同様であるので詳細な説明は省略する。 (Example 2)
Since the thermal power generation facility (1), the water-splitting photocatalytic hydrogen production facility (2) and the chemical synthesis facility (3) are the same as those in the first embodiment, detailed description thereof will be omitted.

海水淡水化設備（４）は、多段フラッシュ方式（ＭＳＦ）の海水淡水化設備である。造水比：６〜１０（約８）、場内消費電力量：４ｋＷｈ／ｍ３−生産淡水、淡水生産規模（出力）：４００ｔ／ｈとした。 The seawater desalination facility (4) is a multistage flash (MSF) seawater desalination facility. Water production ratio: 6 to 10 (about 8), on-site power consumption: 4 kWh / m 3 -production fresh water, fresh water production scale (output): 400 t / h.

海水淡水化システムにおける必要蒸気量（導入時温度２００℃）は、その造水比から４０〜６７ｔ／ｈであり、火力発電設備（１）から導かれる量（４５０ｔ／ｈ）を考えると可能である。また、淡水（９，６００ｔ／ｄａｙ）を生産する際に場内で消費される電力量は、３８．４ＭＷｈ／ｄａｙと概算される。   The required amount of steam in the seawater desalination system (temperature at the time of introduction of 200 ° C.) is 40 to 67 t / h based on the water production ratio, which is possible considering the amount (450 t / h) derived from the thermal power generation facility (1). is there. In addition, the amount of power consumed in the field when producing fresh water (9,600 t / day) is estimated to be 38.4 MWh / day.

水分解光触媒水素製造設備（２）の水素製造量は、３５０ｔ−Ｈ２／ｄａｙ（つまり１７５×１０６ｍｏｌ−Ｈ２／ｄａｙ）であるため、４０×１０６〜７０×１０６ｍｏｌ−ＮＯｘ／ｄａｙの発生は、その全量をアンモニアに変換可能であると見込まれる。発生ＮＯｘ量が生成水素量に比較して少ない場合は、深冷分離などにより別途精製された窒素を導入することで生成水素全量をアンモニアに変換可能である。 Since the hydrogen production amount of the water-splitting photocatalytic hydrogen production facility (2) is 350 t-H 2 / day (that is, 175 × 10 6 mol-H 2 / day), 40 × 10 6 to 70 × 10 6 mol-NOx. The generation of / day is expected to be able to convert the entire amount into ammonia. When the amount of generated NOx is small compared to the amount of generated hydrogen, the total amount of generated hydrogen can be converted to ammonia by introducing nitrogen purified separately by cryogenic separation or the like.

貯蔵・輸送の観点で課題が多い水素をその場でアンモニアに変換することにより、それをキャリアとして貯蔵・輸送することが可能となる。アンモニアは直接あるいは分解して水素として輸送先のアプリケータで利用される。   By converting hydrogen, which has many problems from the viewpoint of storage and transportation, into ammonia on the spot, it can be stored and transported as a carrier. Ammonia is directly or decomposed and used as hydrogen in the destination applicator.

１ 火力発電設備
２ 水分解光触媒水素製造設備
３ 化学合成設備 1 Thermal power generation facility 2 Water splitting photocatalytic hydrogen production facility 3 Chemical synthesis facility

Claims (3)

火力発電設備と、水分解光触媒水素製造設備と、酸化鉄が主成分であり、酸化アルミニウムと酸化カリウムを含む触媒を有し、かつ該火力発電設備から排出される全量のＮＯｘと必要に応じて導かれる窒素、および該水分解光触媒水素製造設備で生成する水素を原料として利用して該触媒の触媒反応によりアンモニアを合成する化学合成設備とを有することを特徴とする複合型火力発電システム。 Thermal power generation facility, water-splitting photocatalytic hydrogen production facility, iron oxide as a main component, a catalyst containing aluminum oxide and potassium oxide , and the total amount of NOx discharged from the thermal power generation facility and as required composite thermal power system, comprising nitrogen derived, and the hydrogen generated in the water decomposition photocatalytic hydrogen production facility by utilizing as a raw material and a chemical synthesis equipment for synthesizing ammonia by catalytic reaction of the catalyst. 前記火力発電設備からの排出蒸気を熱源として利用する海水淡水化設備をさらに有し、該海水淡水化設備で製造された水が前記水分解光触媒水素製造設備に供給される、請求項１に記載の複合型火力発電システム。   The seawater desalination facility that uses steam discharged from the thermal power generation facility as a heat source, and water produced by the seawater desalination facility is supplied to the water splitting photocatalytic hydrogen production facility. Combined thermal power generation system. 前記化学合成設備で副生成する水が、前記水分解光触媒水素製造設備に供給される、請求項１または２に記載の複合型火力発電システム。
The combined thermal power generation system according to claim 1, wherein water by-produced in the chemical synthesis facility is supplied to the water-splitting photocatalytic hydrogen production facility.
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