JP4473568B2 - CO-containing reducing gas production equipment - Google Patents

CO-containing reducing gas production equipment Download PDF

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JP4473568B2
JP4473568B2 JP2003430841A JP2003430841A JP4473568B2 JP 4473568 B2 JP4473568 B2 JP 4473568B2 JP 2003430841 A JP2003430841 A JP 2003430841A JP 2003430841 A JP2003430841 A JP 2003430841A JP 4473568 B2 JP4473568 B2 JP 4473568B2
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combustion
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reducing gas
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JP2005187265A (en
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照祥 平岡
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Krosaki Harima Corp
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本発明は、炭素（Ｃ）とＣＯ２の反応により一酸化炭素ガス（ＣＯ）を含有する還元ガスを製造するＣＯ含有還元ガス製造装置に関する。 The present invention relates to a CO-containing reducing gas production apparatus for producing a reducing gas containing carbon monoxide gas (CO) by reaction of carbon (C) and CO 2 .

鉱石や溶湯に含まれる酸化物の還元にＣＯ含有還元ガスが利用され、また、ＣＯを利用して各種の化学製品が製造されている。ＣＯ含有還元ガスの製造技術は、例えば、特許文献１、２に開示されている。   A CO-containing reducing gas is used to reduce oxides contained in ores and molten metal, and various chemical products are manufactured using CO. Techniques for producing a CO-containing reducing gas are disclosed in Patent Documents 1 and 2, for example.

特許文献１には、図２（ａ）に示すように、炭化水素と水蒸気の混合物をガス改質装置１１で改質して得られた還元性ガスを予熱器１２で予熱した後、部分燃焼装置１３で還元性ガスの一部と酸素との反応により生ずる燃焼熱により加熱昇温させて高温の還元性ガスを製造することが開示されている。   In Patent Document 1, as shown in FIG. 2 (a), a reducing gas obtained by reforming a mixture of hydrocarbon and steam with a gas reformer 11 is preheated with a preheater 12, and then partially combusted. It is disclosed that the apparatus 13 heats and raises the temperature by combustion heat generated by the reaction between part of the reducing gas and oxygen in the apparatus 13 to produce a high-temperature reducing gas.

また、特許文献２には、図２（ｂ）に示すように、コークスなどの炭素系原料を電気誘導路炉１４に設けた誘導加熱コイル１５により溶解させた１６００℃の溶融鉄１６にＯ２、ＣＯ２またはこれらの混合物である酸化性ガスを吹き込んで、ＣＯを製造することが開示されている。
特開平４−３４１５０９号公報 特開２０００−２８１３２６号公報 Further, in Patent Document 2, as shown in FIG. 2B, O 2 is added to molten iron 16 at 1600 ° C. in which a carbon-based raw material such as coke is melted by an induction heating coil 15 provided in an electric induction furnace 14. , CO 2 or a mixture thereof is blown in to produce CO.
JP-A-4-341509 JP 2000-281326 A

特許文献１では、ガス改質装置、予熱器、部分燃焼装置を必要とするため、また、特許文献２に記載されているＣＯの製造では、溶融鉄を約１６００℃の高温の溶融状態に保持する溶融炉が必要であるため、また、いずれも設備が大がかりとなる問題がある。   In Patent Document 1, a gas reformer, a preheater, and a partial combustion device are required. In addition, in the manufacture of CO described in Patent Document 2, molten iron is maintained in a molten state at a high temperature of about 1600 ° C. Therefore, there is a problem that the facilities are large.

そこで、本発明は、ＣＯ含有還元ガスを、大がかりな設備を必要とすることなく効率よく製造することができるＣＯ含有還元ガス製造装置を提供するものである。   Therefore, the present invention provides a CO-containing reducing gas production apparatus that can efficiently produce a CO-containing reducing gas without requiring a large facility.

本発明のＣＯ含有還元ガス製造装置は、燃焼室に隣接して燃焼ガスが通過する複数の通気口が形成された仕切り格子を介して還元室が設けられ、燃焼室は還元室に収容された固体炭素を１０００℃以上に加熱するＣＯ２を含有する燃焼ガスを発生させる、燃料ガスと助燃ガスとにより完全燃焼させる燃焼バーナを備え、還元室は固体炭素を装入する装入口を備えるとともに、仕切り格子の通気口を通過した燃焼室の燃焼ガスのＣＯ２と１０００℃以上に加熱される固体炭素との反応により生成されたＣＯを含有する還元ガスを排気する排気口を備えたことを特徴とする。 The CO-containing reducing gas production apparatus of the present invention is provided with a reduction chamber via a partition grid formed with a plurality of vents through which combustion gas passes adjacent to the combustion chamber, and the combustion chamber is accommodated in the reduction chamber. A combustion burner for generating a combustion gas containing CO 2 that heats solid carbon to 1000 ° C. or more; a combustion burner for completely combusting with a fuel gas and an auxiliary combustion gas; a reduction chamber having an inlet for charging solid carbon; It has an exhaust port for exhausting a reducing gas containing CO generated by a reaction between CO 2 of the combustion gas in the combustion chamber that has passed through the vent of the partition grid and solid carbon heated to 1000 ° C. or more. And

燃焼室に供給されるＮ２量およびＯ２量を調整してＣＯとＮ２の比率を制御するＮ２供給量調整装置を設けることができる。 An N 2 supply amount adjusting device that controls the ratio of CO and N 2 by adjusting the amount of N 2 and O 2 supplied to the combustion chamber can be provided.

本発明では、燃料ガスの完全燃焼によって発生する燃焼熱を固体炭素に与えることにより、ＣＯ２を含有する燃焼ガスを１０００℃以上に加熱された固体炭素を通過させてＣＯに還元することにより、外部から新たな熱源を加えることなく燃焼室の燃焼だけで連続してＣＯ含有還元ガスを連続的に生成することができる効果がある。 In the present invention, by giving the combustion heat generated by the complete combustion of the fuel gas to the solid carbon, the combustion gas containing CO 2 is reduced to CO through the solid carbon heated to 1000 ° C. or more, There is an effect that the CO-containing reducing gas can be continuously generated only by combustion in the combustion chamber without adding a new heat source from the outside.

また、本発明は、固体炭素を１０００℃以上に維持する程度の温度であり、溶融鉄を溶融状態に維持しなくてはならないほどの高温を必要とせず、また、装置本体は燃焼室と還元室を仕切り格子を介して配置しただけの簡単な構造で、予熱室や部分燃焼装置などを設けることなく、高温のＣＯ含有還元ガスが得られるので、大がかりな設備を必要としない利点がある。   In addition, the present invention has a temperature at which solid carbon is maintained at 1000 ° C. or higher, and does not require such a high temperature that the molten iron must be maintained in a molten state. Since the chamber has a simple structure in which the chamber is simply arranged via a partition grid, a high-temperature CO-containing reducing gas can be obtained without providing a preheating chamber or a partial combustion device, and therefore there is an advantage that no large-scale equipment is required.

炭素（Ｃ）とＣＯ２の反応（Ｃ＋ＣＯ２→２ＣＯ ｃａｒｂｏｎ ｓｏｌｕｔｉｏｎ反応）において、温度が１０００℃以上では１００％ＣＯとなることがＢｏｕｎｄｏｕａｒｄ曲線で知られているが、ｃａｒｂｏｎ ｓｏｌｕｔｉｏｎ反応は吸熱反応であるために外部から熱を加えないと反応が進まない。 In the reaction between carbon (C) and CO 2 (C + CO 2 → 2CO carbon solution reaction), it is known from the boundary curve that the temperature is 1000 ° C. or higher, but the carbon solution reaction is an endothermic reaction. Therefore, the reaction does not proceed unless heat is applied from the outside.

ところが、本発明では、燃料ガスを完全燃焼させることによって発生する燃焼熱を固体炭素に与えることにより、固体炭素の温度が１０００℃以上に到達すると、ＣＯ２を含む燃焼ガスを１０００℃以上に加熱された固体炭素層を通過させてＣＯに還元することにより、外部から新たな熱源を加えることなく連続して燃焼ガスの還元を行うことにより、１０００℃以上の高温のＣＯ含有還元ガスを連続的に生成ことができる。 However, in the present invention, by applying combustion heat generated by completely burning the fuel gas to the solid carbon, when the temperature of the solid carbon reaches 1000 ° C. or higher, the combustion gas containing CO 2 is heated to 1000 ° C. or higher. By continuously reducing the combustion gas without adding a new heat source from the outside by passing through the solid carbon layer thus formed, continuous reduction of the high-temperature CO-containing reducing gas at 1000 ° C. or higher is possible. Can be generated.

燃焼室で燃焼させる燃料ガスとしては、助燃ガスにより燃焼にしてＣＯ２を発生する、ＬＮＧ、ＬＰＧあるいはＣＯＧなどを利用することができる。また、還元室に供給する還元剤となる固体炭素としては、コークス、黒鉛、活性炭などを利用することができるが、炭素量が多く且つ容易に入手しやすいことからコークスが適している。 As the fuel gas to be combusted in the combustion chamber, LNG, LPG, COG, or the like that generates CO 2 by combustion with an auxiliary combustion gas can be used. Moreover, as solid carbon used as the reducing agent to be supplied to the reduction chamber, coke, graphite, activated carbon, and the like can be used, but coke is suitable because it has a large amount of carbon and is easily available.

また、本発明では、燃料ガスを燃焼させる助燃ガスを純酸素から空気、さらには窒素添加空気などに変化させてＮ２供給量を調整することにより、得られる還元ガス中のＣＯ／Ｎ２比率を任意に制御することができる。あるいは、成分調整のためにＮ２を燃焼室に別途供給してもよい。 Further, in the present invention, the CO / N 2 ratio in the obtained reducing gas is obtained by adjusting the N 2 supply amount by changing the auxiliary combustion gas for burning the fuel gas from pure oxygen to air, further nitrogen-added air or the like. Can be controlled arbitrarily. Alternatively, N 2 may be separately supplied to the combustion chamber for component adjustment.

以下本実施例について図面を参照して説明する。なお、実施例では、燃焼室の上部に仕切り格子を介して還元室を配置した縦型の例であるが、燃焼室の後面に仕切り格子を介して還元室を配置して横型にしてもよい。   The present embodiment will be described below with reference to the drawings. In the embodiment, the reduction chamber is disposed in the upper part of the combustion chamber via a partition grid. However, the reduction chamber may be disposed on the rear surface of the combustion chamber via the partition grid to form a horizontal type. .

図１は本発明のＣＯ含有高温還元ガス製造装置の一実施例を示す概略図である。図１において、製造装置本体１、燃焼室２の上部に仕切り格子４を介して還元室３が設けられている。燃焼室２、還元室３は耐火物により形成され、両室２，３を仕切る仕切り格子４は耐火物で形成されるとともに、燃焼室２の燃焼ガスが上昇して通過する複数の通気口４ａが形成されている。   FIG. 1 is a schematic view showing an embodiment of the CO-containing high-temperature reducing gas production apparatus of the present invention. In FIG. 1, a reduction chamber 3 is provided above a production apparatus main body 1 and a combustion chamber 2 via a partition grid 4. The combustion chamber 2 and the reduction chamber 3 are formed of a refractory material, and the partition lattice 4 that partitions both the chambers 2 and 3 is formed of a refractory material, and a plurality of vent holes 4a through which the combustion gas in the combustion chamber 2 rises and passes. Is formed.

燃焼室２にはＬＰＧなどの燃料ガスを燃焼させる燃焼バーナ５が設けられ、燃料バーナ５には、酸素、空気あるいは酸素富化空気など助燃ガスを供給する助燃ガス供給管５ａが接続されている。助燃ガス供給管５ａで助燃ガスの種類を変更してＣＯ／Ｎ２比率を調整する。また、成分調整用ガスとしてＮ２を単独で添加したり、他の施設から発生するＣＯ２を添加したりするガス供給管６を補助的に設けてもよい。助燃ガスの変更等によるＮ２供給量の調整は、Ｎ２供給量調整装置（図示せず）で行うことができる。 The combustion chamber 2 is provided with a combustion burner 5 for burning a fuel gas such as LPG. The fuel burner 5 is connected to an auxiliary combustion gas supply pipe 5a for supplying an auxiliary combustion gas such as oxygen, air or oxygen-enriched air. . The CO / N 2 ratio is adjusted by changing the type of the auxiliary combustion gas in the auxiliary combustion gas supply pipe 5a. Further, a gas supply pipe 6 for adding N 2 alone as a component adjusting gas or adding CO 2 generated from another facility may be provided as an auxiliary. Adjustment of N 2 supply amount of the change of combustion aid gas can be carried out in N 2 supply amount adjusting apparatus (not shown).

還元室３には、還元剤となる固体炭素Ｃを装入する還元剤装入装置（図示せず）に接続された還元剤装入口７と、生成されたＣＯ含有還元性ガスを排気する排気口８が設けられている。   The reducing chamber 3 has a reducing agent charging port 7 connected to a reducing agent charging device (not shown) for charging solid carbon C as a reducing agent, and an exhaust for exhausting the generated CO-containing reducing gas. A mouth 8 is provided.

排気口８はダクト９に接続され、ダクト９にはＣＯ含有還元性ガスを吸引する吸引ファン１０が設けられている。生成されたＣＯを還元室３からダクト９へ排気する場合、吸引ファン１０に代えて、要求される圧力に応じて、燃焼バーナ５の助燃ガスあるいは成分調整用ガスを圧入して行うこともできる。   The exhaust port 8 is connected to a duct 9, and the duct 9 is provided with a suction fan 10 for sucking CO-containing reducing gas. When the produced CO is exhausted from the reduction chamber 3 to the duct 9, it can be performed by injecting the auxiliary combustion gas or the component adjusting gas of the combustion burner 5 according to the required pressure instead of the suction fan 10. .

生成したＣＯ含有還元性ガスは、還元ガスを必要とする設備に高温の状態で直接供給したり、あるいは貯留タンクに貯留してもよい。   The generated CO-containing reducing gas may be supplied directly to a facility requiring the reducing gas at a high temperature or may be stored in a storage tank.

前記構成のＣＯ含有還元ガス製造装置において、固体炭素Ｃとしてコークスを還元剤装入口７から装入した後、燃焼バーナ５にＬＰＧと酸素を供給して完全燃焼させ、燃焼室２から仕切り格子４の通気口４ａを通って還元室２に上昇するＣＯ２を含有する燃焼ガスの燃焼熱でコークスを１０００℃以上に加熱する。コークスＣが１０００℃以上になると燃焼ガスのＣＯ２がコークスＣと反応して高温のＣＯ含有還元ガスが連続して生成され、排気口８から排出される。 In the CO-containing reducing gas production apparatus having the above-described configuration, coke as solid carbon C is charged from the reducing agent charging port 7, and then LPG and oxygen are supplied to the combustion burner 5 for complete combustion. The coke is heated to 1000 ° C. or higher with the combustion heat of the combustion gas containing CO 2 rising to the reduction chamber 2 through the vent 4a. When the coke C reaches 1000 ° C. or higher, the CO 2 of the combustion gas reacts with the coke C, and a high-temperature CO-containing reducing gas is continuously generated and discharged from the exhaust port 8.

本発明のＣＯ含有還元ガス製造装置は、ＣＯ含有還元ガスを原料とする化学製品の製造、高温のＣＯ含有還元ガスによる鉱石や溶湯の還元、石炭のガス化、あるいはＣＯ２を発生する焼却炉や発電ボイラーの排ガス中のＣＯ２処理に利用することができる。 The CO-containing reducing gas production apparatus of the present invention is an incinerator for producing chemical products using CO-containing reducing gas as a raw material, reducing ore and molten metal with high-temperature CO-containing reducing gas, gasification of coal, or generating CO 2. And can be used for CO 2 treatment in the exhaust gas of a power generation boiler.

本発明のＣＯ含有還元ガス製造装置の一実施例を示す概略図である。It is the schematic which shows one Example of the CO containing reducing gas manufacturing apparatus of this invention. 従来の還元ガスの製造装置の例を示す概略図である。It is the schematic which shows the example of the manufacturing apparatus of the conventional reducing gas.

符号の説明Explanation of symbols

１：製造装置本体
２：燃焼室
３：還元室
４：仕切り格子
４ａ：通気口
５：燃焼バーナ
５ａ：助燃ガス供給管
６：ガス供給管
７：還元剤装入口
８：排気口
９：ダクト
１０：吸引ファン
１１：ガス改質装置
１２：予熱器
１３：部分燃焼装置
１４：炉
１５：誘導加熱コイル
１６：溶融鉄


1: Manufacturing apparatus body 2: Combustion chamber 3: Reduction chamber 4: Partition grid 4a: Vent 5: Combustion burner 5a: Auxiliary combustion gas supply pipe 6: Gas supply pipe 7: Reducing agent charging inlet 8: Exhaust outlet 9: Duct 10 : Suction fan 11: Gas reformer 12: Preheater 13: Partial combustion device 14: Furnace 15: Induction heating coil 16: Molten iron


Claims (2)

燃焼室に隣接して燃焼ガスが通過する複数の通気口が形成された仕切り格子を介して還元室が設けられ、
燃焼室は還元室に収容された固体炭素を１０００℃以上に加熱するＣＯ２を含有する燃焼ガスを発生させる、燃料ガスと助燃ガスとにより完全燃焼させる燃焼バーナを備え、
還元室は固体炭素を装入する装入口を備えるとともに、仕切り格子の通気口を通過した燃焼室の燃焼ガスのＣＯ２と１０００℃以上に加熱される固体炭素との反応により生成されたＣＯを含有する還元ガスを排気する排気口を備えたことを特徴とするＣＯ含有還元ガス製造装置。 A reduction chamber is provided through a partition grid formed with a plurality of vents through which combustion gas passes adjacent to the combustion chamber;
The combustion chamber includes a combustion burner that completely burns with a fuel gas and an auxiliary combustion gas, which generates a combustion gas containing CO 2 that heats solid carbon contained in the reduction chamber to 1000 ° C. or more,
The reduction chamber has an inlet for charging solid carbon, and CO generated by the reaction between the combustion gas CO 2 in the combustion chamber that has passed through the vents of the partition grid and the solid carbon heated to 1000 ° C. or more. A CO-containing reducing gas production apparatus comprising an exhaust port for exhausting contained reducing gas. 燃焼室に供給されるＮ２量およびＯ２量を調整してＣＯとＮ２の比率を制御するＮ２供給量調整装置を設けたことを特徴とする請求項１記載のＣＯ含有還元ガスの製造装置。





 2. The CO-containing reducing gas according to claim 1, further comprising an N 2 supply amount adjusting device that controls a ratio of CO and N 2 by adjusting an amount of N 2 and an amount of O 2 supplied to the combustion chamber. Manufacturing equipment.





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KR100637340B1 (en) * 2004-04-09 2006-10-23 김현영 A high temperature reformer
SE531101C2 (en) * 2006-12-14 2008-12-16 Rolf Ljunggren Process and plant for producing synthesis gas from biomass
DE102007062413B3 (en) * 2007-12-20 2009-09-10 Conera Process Solutions Gmbh Process and apparatus for reprocessing CO2-containing exhaust gases
GB2466260A (en) * 2008-12-17 2010-06-23 Stephen Mattinson Waste reduction and conversion process with syngas production and combustion
JP5479951B2 (en) * 2010-03-03 2014-04-23 シンリュウ株式会社 Electric pottery kiln with reduction firing function
CN103771416B (en) * 2013-12-12 2015-12-09 西安航天动力机械厂 A kind of real-time method and device preparing CO gas
KR101790686B1 (en) * 2015-12-07 2017-10-27 충북대학교 산학협력단 synthesis method of CO gas by CO2 conversion technology

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