JPH083105B2 - Ammonia reduction method in coal gasification gas. - Google Patents
Ammonia reduction method in coal gasification gas.Info
- Publication number
- JPH083105B2 JPH083105B2 JP63148288A JP14828888A JPH083105B2 JP H083105 B2 JPH083105 B2 JP H083105B2 JP 63148288 A JP63148288 A JP 63148288A JP 14828888 A JP14828888 A JP 14828888A JP H083105 B2 JPH083105 B2 JP H083105B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- coal gasification
- ammonia
- gasification gas
- reduction method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims description 22
- 239000003245 coal Substances 0.000 title claims description 17
- 238000002309 gasification Methods 0.000 title claims description 12
- 229910021529 ammonia Inorganic materials 0.000 title claims description 11
- 238000000034 method Methods 0.000 title claims description 5
- 239000007789 gas Substances 0.000 claims description 39
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 31
- 239000003054 catalyst Substances 0.000 claims description 13
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 238000010531 catalytic reduction reaction Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- ODUCDPQEXGNKDN-UHFFFAOYSA-N Nitrogen oxide(NO) Natural products O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
-
- 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
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は石炭ガス化炉で発生するガス中に含まれるア
ンモニアを低減させる方法に関する。TECHNICAL FIELD The present invention relates to a method for reducing ammonia contained in gas generated in a coal gasification furnace.
石炭ガス化炉とガスタービンを組み合せた従来の設備
の一態様を第３図によつて説明する。One mode of conventional equipment in which a coal gasifier and a gas turbine are combined will be described with reference to FIG.
石炭ガス化炉１での反応は、還元雰囲気での反応であ
るため、ガスタービン燃焼器３への経路２中の石炭ガス
化炉発生ガスはアンモニア（NH3）を多量に含んでい
る。このNH3を多量に含んだガスをガスタービン燃料と
して投入した場合、ガスタービン燃焼器３でNH3はNOxに
なるためガスタービン排ガス配管４の排ガス中のNOx濃
度は非常に高くなり、NOxの環境排出規制上好ましくな
い。Since the reaction in the coal gasifier 1 is a reaction in a reducing atmosphere, the gas generated from the coal gasifier in the path 2 to the gas turbine combustor 3 contains a large amount of ammonia (NH 3 ). When this gas containing a large amount of NH 3 is injected as the gas turbine fuel, NH 3 becomes NOx in the gas turbine combustor 3, so the NOx concentration in the exhaust gas of the gas turbine exhaust gas pipe 4 becomes very high, and Not desirable for environmental emission regulations.
本発明は上記技術水準に鑑み、石炭ガス化ガス中のNH
3を低減する合目的な方法を提供しようとするものであ
る。In view of the above state of the art, the present invention provides NH in coal gasification gas.
It is intended to provide a purposeful method of reducing 3 .
本発明は石炭ガス化炉で発生する石炭ガス化ガスの燃
焼器への供給経路に、ガス温度200〜500℃の範囲内の経
路にアンモニアを還元剤とする選択接触還元脱硝触媒層
を設け、該触媒層の前流側に窒素酸化物及び酸素含有ガ
スを注入することを特徴とする石炭ガス化ガス中のアン
モニアの低減法である。The present invention, in the supply path to the combustor of the coal gasification gas generated in the coal gasification furnace, the selective catalytic reduction NOx removal catalyst layer using ammonia as a reducing agent in the path in the range of gas temperature 200 ~ 500 ℃, A method for reducing ammonia in coal gasification gas, which comprises injecting a nitrogen oxide and an oxygen-containing gas into the upstream side of the catalyst layer.
本発明において使用されるアンモニアを還元剤とする
選択触媒還元脱硝触媒としては、一般燃焼排ガス中のNO
xをアンモニアを還元剤として選択的に除去する際に使
用される脱硝触媒であれば任意のものが使用し得る。例
えばTiO2担体とし、活性成分としてＶ、Ｗ、Mo、Fe、Cu
などの酸化物を担持したものが使用できる。また、その
触媒形状も任意のものが使用できるが、圧損の少ないハ
ニカム状のものを使用することが好ましい。The selective catalytic reduction denitration catalyst using ammonia as a reducing agent used in the present invention includes NO in general combustion exhaust gas.
Any denitration catalyst can be used as long as it is a denitration catalyst used when x is selectively removed by using ammonia as a reducing agent. For example, TiO 2 carrier and active ingredients such as V, W, Mo, Fe, Cu
Those carrying oxides such as can be used. The catalyst may have any shape, but it is preferable to use a honeycomb shape with less pressure loss.
また、これら触媒層の設置位置は経路中のガス温度が
200〜500℃がよく、特に300〜450℃の範囲がより好まし
いことを本発明者らの実験結果によつて確認した。In addition, the installation position of these catalyst layers depends on the gas temperature in the route.
It was confirmed from the results of experiments conducted by the present inventors that 200 to 500 ° C. is preferable, and particularly 300 to 450 ° C. is more preferable.
本発明においては石炭ガス化炉とガスタービン燃焼器
の経路のガス温度が200〜500℃の個所に、上記した触媒
層を設置し、その上流側に窒素酸化物（NO）と酸素含有
ガス（O2）を注入するものであるが、これは石炭ガス化
炉発生ガス中のNH3と注入された適量のNO及びO2を反応
あさせて下記式の反応によりNH3を安定なN2に変えるた
めである。In the present invention, the gas temperature of the path of the coal gasifier and the gas turbine combustor is installed at a location of 200 to 500 ° C., where the above catalyst layer is installed, and nitrogen oxide (NO) and oxygen-containing gas (NO) are provided on the upstream side thereof. O 2 ) is injected, which reacts NH 3 in the gas generated from the coal gasifier with an appropriate amount of injected NO and O 2 and reacts NH 3 with stable N 2 by the reaction of the following formula. To change to.
4NH3＋4NO＋O2→4N2＋6H2O 上記反応により、ガスタービン燃焼器に投入されるガ
ス中に含まれるNH3は極力低減されN2に変化しているた
めガスタービン燃焼器で発生するNOxは低くガスタービ
ン排ガス中のNOxは低い値となる。4NH 3 ＋ 4NO ＋ O 2 → 4N 2 ＋ 6H 2 O Due to the above reaction, the NH 3 contained in the gas injected into the gas turbine combustor is reduced as much as possible and changed to N 2 , so the NOx generated in the gas turbine combustor is It is low and NOx in the gas turbine exhaust gas is low.
以下、本発明の一実施例を第１図にしたがつて説明す
る。第１図において、第３図と同一符号は第３図と同一
部を示す。５は石炭ガス変ガス供給経路２に設けられた
値裾酸化物（NO）及び酸素含有ガス（O2）注入器、６は
アンモニアを還元剤とする選択接触脱硝触媒を充填した
反応器である。An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, the same symbols as those in FIG. 3 indicate the same parts as those in FIG. Reference numeral 5 is a value tail oxide (NO) and oxygen-containing gas (O 2 ) injector provided in the coal gas conversion gas supply path 2, and 6 is a reactor filled with a selective catalytic denitration catalyst using ammonia as a reducing agent. .
第１図のフローにおいて、石炭ガス化ガス中のNH3に
対して、 4NH3＋4NO＋O2→4N2＋6H2O の反応に見合うNO及びO2を注入し、反応器６を設置した
個所の温度によつて上記反応がどのように生起するかを
調べた結果を第２図に示す。In the flow of Fig. 1, the temperature of the place where the reactor 6 was installed by injecting NO and O 2 that correspond to the reaction of 4NH 3 + 4NO + O 2 → 4N 2 + 6H 2 O to NH 3 in the coal gasification gas. Fig. 2 shows the results of an examination of how the above reaction occurs according to.
第２図はガス温度（反応器６の設置温度）（℃）と脱
NH3率（％）との関係を示す図表でこれより反応器６を
設置する個所の温度は200〜500℃、特に300〜450℃の範
囲内が好ましいことが判る。Figure 2 shows the gas temperature (installation temperature of reactor 6) (° C) and desorption
From the graph showing the relationship with the NH 3 rate (%), it can be seen that the temperature at the place where the reactor 6 is installed is preferably 200 to 500 ° C., particularly preferably 300 to 450 ° C.
次に、第１図のフローにおいて、脱硝触媒を充填した
反応器６を最適温度の部位の経路２中に設置し、O2の
み注入し、NOは注入しない場合（比較例１）、NOのみ
注入し、O2は注入しない場合（比較例２）及びNOとO2
の両者を注入した場合（実施例）を実施し、下表のよう
な結果を得た。Next, in the flow of FIG. 1, when the reactor 6 filled with the denitration catalyst is installed in the path 2 at the optimum temperature site and only O 2 is injected and NO is not injected (Comparative Example 1), only NO is injected. Injecting O 2 but not O 2 (Comparative Example 2) and NO and O 2
Both were injected (Example), and the results shown in the table below were obtained.
〔発明の効果〕 ガスタービンに投入される石炭ガス化ガス中のNH3濃
度が低くなり、ガスタービン排ガス中のNOx濃度が低く
なり大気中に放出されるNOxが低減できる。 [Advantages of the Invention] The NH 3 concentration in the coal gasification gas fed into the gas turbine becomes low, the NOx concentration in the gas turbine exhaust gas becomes low, and the NOx released to the atmosphere can be reduced.
【図面の簡単な説明】 第１図は本発明の一実施例のフローを説明するための
図、第２図は本発明のアンモニアを還元剤とする選択接
触脱硝触媒層の設置位置と脱NH3率の関係を示す図表、
第３図は従来の石炭ガス化炉とガスタービンとの組合せ
設備を示す図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining the flow of one embodiment of the present invention, and FIG. 2 is the installation position and de-NH 2 of the selective catalytic denitration catalyst layer using ammonia of the present invention as a reducing agent. Chart showing the relationship between the three rates,
FIG. 3 is a diagram showing a conventional combined facility of a coal gasification furnace and a gas turbine.
Claims (1)
燃焼器への供給経路に、ガス温度200〜500℃の範囲内の
経路にアンモニアを還元剤とする選択接触還元脱硝触媒
層を設け、該触媒層の前流側に窒素酸化物及び酸素含有
ガスを注入することを特徴とする石炭ガス化ガス中のア
ンモニアの低減法。1. A selective catalytic reduction NOx removal catalyst layer using ammonia as a reducing agent is provided in a path of a gas temperature of 200 to 500 ° C. in a path for supplying coal gasification gas generated in a coal gasification furnace to a combustor. A method for reducing ammonia in a coal gasification gas, comprising providing and injecting a nitrogen oxide and an oxygen-containing gas into the upstream side of the catalyst layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63148288A JPH083105B2 (en) | 1988-06-17 | 1988-06-17 | Ammonia reduction method in coal gasification gas. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63148288A JPH083105B2 (en) | 1988-06-17 | 1988-06-17 | Ammonia reduction method in coal gasification gas. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01318082A JPH01318082A (en) | 1989-12-22 |
| JPH083105B2 true JPH083105B2 (en) | 1996-01-17 |
Family
ID=15449419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63148288A Expired - Fee Related JPH083105B2 (en) | 1988-06-17 | 1988-06-17 | Ammonia reduction method in coal gasification gas. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH083105B2 (en) |
-
1988
- 1988-06-17 JP JP63148288A patent/JPH083105B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01318082A (en) | 1989-12-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |