JPH044015B2 - - Google Patents
Info
- Publication number
- JPH044015B2 JPH044015B2 JP61056063A JP5606386A JPH044015B2 JP H044015 B2 JPH044015 B2 JP H044015B2 JP 61056063 A JP61056063 A JP 61056063A JP 5606386 A JP5606386 A JP 5606386A JP H044015 B2 JPH044015 B2 JP H044015B2
- Authority
- JP
- Japan
- Prior art keywords
- water
- desulfurization
- coal ash
- lime
- curing
- 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 - Lifetime
Links
- 238000006477 desulfuration reaction Methods 0.000 claims description 24
- 230000023556 desulfurization Effects 0.000 claims description 24
- 239000010883 coal ash Substances 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 14
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 14
- 239000004571 lime Substances 0.000 claims description 14
- -1 alkaline earth metal salt Chemical class 0.000 claims description 13
- 150000001339 alkali metal compounds Chemical class 0.000 claims description 12
- 229910052784 alkaline earth metal Inorganic materials 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 description 23
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 239000002250 absorbent Substances 0.000 description 7
- 230000002745 absorbent Effects 0.000 description 7
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 7
- 239000000920 calcium hydroxide Substances 0.000 description 7
- 235000011116 calcium hydroxide Nutrition 0.000 description 7
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 7
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 238000011056 performance test Methods 0.000 description 5
- 235000012239 silicon dioxide Nutrition 0.000 description 5
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 4
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 235000011121 sodium hydroxide Nutrition 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 239000000292 calcium oxide Substances 0.000 description 2
- 235000012255 calcium oxide Nutrition 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 229910001617 alkaline earth metal chloride Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002823 nitrates Chemical class 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 150000003112 potassium compounds Chemical class 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Description
〔産業上の利用分野〕
本発明は、石炭、重油等の燃料の燃焼に伴う排
ガスの脱硫脱硝剤の製造方法に関する。
〔従来の技術〕
石炭、重油等の燃焼に伴い発生する排ガス中に
含まれる硫黄酸化物および窒素酸化物等は、建
物、構築物等に害を与えるばかりでなく、動植物
さらには人体にも極めて大きな影響を及ぼすこと
が判明し、排ガス中の蒸気物質を除去する方法す
なわち脱硫、脱硝法が研究され、多種多様な方式
が開発されている。
これらの脱硫、脱硝法は乾式法および湿式法に
大別される。本発明の属する乾式脱硫法には第１
表に示す方法が知られている。
[Industrial Application Field] The present invention relates to a method for producing a desulfurization and denitrification agent for exhaust gas accompanying the combustion of fuel such as coal and heavy oil. [Prior art] Sulfur oxides, nitrogen oxides, etc. contained in the exhaust gas generated from the combustion of coal, heavy oil, etc. not only harm buildings, structures, etc., but also have extremely large effects on animals, plants, and even the human body. As a result, research has been conducted into methods for removing vaporous substances from exhaust gas, such as desulfurization and denitrification methods, and a wide variety of methods have been developed. These desulfurization and denitrification methods are broadly classified into dry methods and wet methods. The dry desulfurization method to which the present invention belongs includes the first
The methods shown in the table are known.
本発明の目的は、上述の従来の乾式脱硫および
脱硝方式の種々の問題点を解決し、脱硫と脱硝を
同時に行うことも可能な脱硫脱硝剤の製造方法を
提供することにある。
〔問題点を解決するための手段〕
本発明者の一人は先に脱硫、脱硝用吸収剤とし
て、石炭灰・硫酸・石灰系吸収剤、石炭灰・硫酸
カルシウム・石灰系吸収剤、および石炭灰・セメ
ント系吸収剤について研究し前２者が吸収剤とし
て工業的に有用であることを開示した（特願昭60
−51247、特公平３−59737号公報参照）。その後
も、石炭灰、石灰系の吸収剤を種々検討した結
果、石炭灰および石灰に水溶性のアルカリを加え
ると、脱硫脱硝剤としての性能が向上することを
見出した。
すなわちこの発明は、
(1) 石炭灰、石灰および水溶性のアルカリ土類金
属塩またはアルカリ金属化合物を水と混合した
後、湿空養生および／または蒸気養生すること
を特徴とする脱硫脱硝剤の製造方法および
(2) 石炭灰、石灰および水溶性アルカリ土類金属
塩またはアルカリ金属化合物を水を混合した
後、湿空養生および／または蒸気養生し、30℃
以上の温度で熱処理することを特徴とする脱硫
脱硝剤の製造方法である。
この発明で石灰とは生石灰、消石灰、炭酸石灰
をいう。
水溶性アルカリ土類金属塩とはアルカリ土類金
属の塩化物、硝酸塩等で、塩化カルシウム、硝酸
カルシウム、塩化マグネシウム、硫酸マグネシウ
ム等のほかに他の物質例えばチオ硫酸ソーダの添
加により水溶化される硫酸カルシウムを含む。
アルカリ金属化合物としてはナトリウムまたは
カリウムの化合物が好ましく水酸化ナトリウム、
水酸化カリウムが特に好ましい。
石炭灰は、石炭の銘柄、燃焼方法による制限は
特になく、一般に二酸化硅素、酸化アルミニウム
および酸化カルシウムを含む。
後述する実施例に使用した石炭灰の組成を、一
例として第２表に示した。
An object of the present invention is to solve the various problems of the conventional dry desulfurization and denitrification methods described above, and to provide a method for producing a desulfurization and denitrification agent that can perform desulfurization and denitration at the same time. [Means for Solving the Problems] One of the inventors of the present invention previously developed coal ash/sulfuric acid/lime based absorbents, coal ash/calcium sulfate/lime based absorbents, and coal ash as absorbents for desulfurization and denitrification.・Researched on cement-based absorbents and disclosed that the first two were industrially useful as absorbents (patent application filed in 1983).
-51247, see Japanese Patent Publication No. 3-59737). After that, as a result of various studies on coal ash and lime-based absorbents, it was discovered that adding a water-soluble alkali to coal ash and lime improves its performance as a desulfurization and denitrification agent. That is, the present invention provides a desulfurization and denitrification agent characterized in that: (1) coal ash, lime, and a water-soluble alkaline earth metal salt or alkali metal compound are mixed with water and then subjected to humid air curing and/or steam curing; Manufacturing method and (2) After mixing coal ash, lime, and water-soluble alkaline earth metal salt or alkali metal compound with water, curing in humid air and/or steam curing at 30℃
This is a method for producing a desulfurization and denitrification agent, which is characterized by carrying out heat treatment at a temperature above. In this invention, lime refers to quicklime, slaked lime, and carbonated lime. Water-soluble alkaline earth metal salts are alkaline earth metal chlorides, nitrates, etc., which can be made water-soluble by adding other substances such as sodium thiosulfate to calcium chloride, calcium nitrate, magnesium chloride, magnesium sulfate, etc. Contains calcium sulfate. As the alkali metal compound, sodium or potassium compounds are preferred, such as sodium hydroxide,
Potassium hydroxide is particularly preferred. Coal ash is not particularly limited by the brand of coal or combustion method, and generally contains silicon dioxide, aluminum oxide, and calcium oxide. The composition of the coal ash used in the examples described below is shown in Table 2 as an example.
【表】
この発明で石炭灰、石灰、水溶性アルカリ土類
金属塩またはアルカリ金属化合物の使用重量割合
は、石炭灰が27〜92％、石灰が５〜70％、水溶性
アルカリ土類金属塩またはアルカリ金属化合物が
0.2〜５％である。
次に本発明の脱硫脱硝剤の製造方法を具体的に
述べる。
上記原料を必要により粉砕後混合し、さらに水
を加えて混合する。この場合、NaS2O3等の硬化
補助剤を添加することができる。混合物中の水の
量は原料乾物100重量部当たり約20〜約50重量部
が適当である。
次に混合物を湿空養生および／または蒸気養生
する。湿空養生は常温で相対湿度50％〜100％で
１週間程度が好ましく、また蒸気養生は、常圧で
温度30℃〜100℃、相対湿度100％、0.5〜72時間
が好ましい。高圧蒸気養生は180℃以下で効果が
あるが140℃以下で、相対湿度100％、0.1〜10時
間が好ましい。これらの養生法は、繰り返しまた
は組合わせて行つて好結果を得る場合がある。養
生後の硬化物を常法により破砕あるいは養生前に
造粒、整粒して本発明の脱硫脱硝剤を得ることが
できる。
さらに養生後の硬化物を30℃以上、好ましくは
50℃〜200℃の範囲で10分〜10時間熱処理するこ
とによつて、より脱硫脱硝の性能を向上させるこ
とができる。
以下実施例を挙げてさらに詳細に説明する。
実施例 １〜２
市販の消石灰、塩化カルシウムに前述の石炭灰
を第４表に示す配合にしたがつて混合し、水を加
えて再度混合し、常圧100℃の蒸気養生を６時間
行い、得られた硬化物を破砕して粒径0.5〜0.7mm
に整粒し、そのままあるいは130℃で２時間熱処
理して本発明の脱硫脱硝剤を得た。
これらの剤を用いて第３表に示す試験条件で脱
硫脱硝試験（SO2、NOx除去試験）を行い、３時
間後の積分脱硫脱硝率と脱硫率100％維持時間を
求め第４表に示した。
なお同表に比表面積の測定値も並記した。比表
面積の測定は、試料を200℃で１時間脱ガスした
後BET法で行つた。[Table] In this invention, the weight proportions of coal ash, lime, water-soluble alkaline earth metal salts or alkali metal compounds used are 27 to 92% for coal ash, 5 to 70% for lime, and 5 to 70% for water-soluble alkaline earth metal salts. or alkali metal compounds
It is 0.2-5%. Next, the method for producing the desulfurization and denitrification agent of the present invention will be specifically described. The above raw materials are mixed after being pulverized if necessary, and water is further added and mixed. In this case, a curing aid such as NaS 2 O 3 can be added. The amount of water in the mixture is suitably about 20 to about 50 parts by weight per 100 parts by weight of the dry material. The mixture is then subjected to humid air curing and/or steam curing. Humid air curing is preferably performed at room temperature and relative humidity of 50% to 100% for about one week, and steam curing is preferably performed at normal pressure, temperature of 30° C. to 100° C., and relative humidity of 100% for 0.5 to 72 hours. High-pressure steam curing is effective at temperatures below 180°C, but preferably below 140°C, relative humidity 100%, and 0.1 to 10 hours. These regimens may be repeated or combined with good results. The desulfurization and denitrification agent of the present invention can be obtained by crushing the cured product by a conventional method or by granulating and sizing the cured product before curing. Furthermore, after curing, the cured product should be heated to 30℃ or higher, preferably
The desulfurization and denitrification performance can be further improved by performing heat treatment in the range of 50°C to 200°C for 10 minutes to 10 hours. The present invention will be explained in more detail below with reference to Examples. Examples 1-2 The above-mentioned coal ash was mixed with commercially available slaked lime and calcium chloride according to the formulation shown in Table 4, water was added and mixed again, and steam curing at normal pressure of 100°C was performed for 6 hours. The obtained cured product is crushed to a particle size of 0.5 to 0.7 mm.
The desulfurization and denitrification agent of the present invention was obtained by sizing the particles and heat-treating them as they were or at 130°C for 2 hours. Using these agents, a desulfurization and denitrification test (SO 2 , NO x removal test) was conducted under the test conditions shown in Table 3, and the integrated desulfurization and denitrification rates after 3 hours and the desulfurization rate 100% maintenance time were determined as shown in Table 4. Indicated. In addition, the measured values of specific surface area are also listed in the same table. The specific surface area was measured by the BET method after degassing the sample at 200°C for 1 hour.
【表】
実施例 ３〜４
市販の消石灰に水溶性のアルカリ土類金属塩と
して最終混合物中の水分の30％相当の水を含む硝
酸カルシウム水溶液を加え、さらに前例の石炭灰
を第４表に示す配合にしたがつて混合し、水を加
えて水分を原料乾物100部当たり41部となし、再
度混合し、常圧100℃の蒸気養生を６時間行い、
得られた硬化物を破砕して粒径を0.5〜0.7mmにそ
ろえ、130℃で２時間熱処理して本発明の脱硫脱
硝剤を得た。
これらの剤について前例と同様の条件で行つた
性能試験および測定の結果を第４表に示した。
実施例 ５〜６
市販の消石灰に水溶性アルカリ金属塩として最
終混合物中のの水分の30％相当の水を含む苛性ソ
ーダ水溶液を加え、さらに前例の石炭灰を第４表
に示す配合にしたがつて混合し、水を加えて水分
を原料乾物100部当たり41部となし、再度混合し、
常圧100℃の蒸気養生を６時間行い、得られた硬
化物を破砕して粒径0.5〜0.7mmにそろえ、130℃
で２時間熱処理して本発明の脱硫脱硝剤を得た。
これらの剤について前例と同様の条件で行つた
性能試験および測定の結果を第４表に示した。
比較例
水溶性のアルカリ土類金属塩またはアルカリ金
属化合物を加えることなく、石炭灰と消石灰のみ
を用いて、第４表の配合にしたがい、実施例３〜
４と同じ操作で破砕硬化物を得た。
実施例と同様の条件で行つた性能試験および測
定結果を第４表に示した。
参考例 １〜２
市販の消石灰、ケイ酸、水酸化アルミニウムお
よび水溶性のアルカリ土類金属塩として最終混合
物中の水分の30％相当の水を含む硫酸カルシウム
水溶液を第４表に示す配合にしたがつて混合し、
水を加えて水分を原料乾物100部当たり41部とな
し、再度混合し、常圧100℃の蒸気養生を６時間
行い、得られた硬化物を破砕して粒径0.5〜0.7mm
にそろえ、130℃、２時間熱処理して粒状物を得
た。使用したケイ酸および水酸化アルミニウムは
実施例の石炭灰の組成にほぼ見合うものである。
これらについて前例と同様の条件で行つた性能
試験および測定の結果を第４表に示した。
参考例 ３〜４
市販の消石灰、ケイ酸、水酸化アルミニウムお
よびアルカリ金属化合物として最終混合物中の水
分の30％相当の水を含む苛性ソーダ水溶液を第４
表に示す配合にしたがつて混合し、水を加えて水
分を原料乾物100部当たり41部となし、再度混合
し、常圧100℃の蒸気養生を６時間行い、得られ
た硬化物を破砕して粒径0.5〜0.7mmにそろえ、
130℃、２時間熱処理して粒状物を得た。使用し
たケイ酸および水酸化アルミニウムは、実施例の
石炭灰の組成にほぼ見合うものである。
これらについて前例と同様の条件で行つた性能
試験および測定の結果を第４表に示した。
第４表から、本願で原料として使用するアルカ
リ土類金属塩またはアルカリ金属化合物は石炭灰
中のアルカリ金属化合物（酸化物として２％）と
は異なり、石炭灰・石灰系吸収剤の性能を著しく
向上させるものと考えられる。[Table] Examples 3 to 4 A calcium nitrate aqueous solution containing water equivalent to 30% of the water in the final mixture as a water-soluble alkaline earth metal salt was added to commercially available slaked lime, and the coal ash from the previous example was added as shown in Table 4. Mix according to the recipe shown, add water to make the moisture content 41 parts per 100 parts of raw material dry matter, mix again, steam cure at normal pressure 100°C for 6 hours,
The obtained cured product was crushed to have a particle size of 0.5 to 0.7 mm, and heat treated at 130°C for 2 hours to obtain the desulfurization and denitrification agent of the present invention. Table 4 shows the results of performance tests and measurements conducted on these agents under the same conditions as in the previous example. Examples 5-6 A caustic soda aqueous solution containing water equivalent to 30% of the water in the final mixture was added as a water-soluble alkali metal salt to commercially available slaked lime, and the coal ash from the previous example was mixed according to the formulation shown in Table 4. Mix, add water to make the moisture content 41 parts per 100 parts of raw material dry matter, mix again,
Steam curing was carried out at normal pressure of 100°C for 6 hours, and the resulting cured product was crushed to a particle size of 0.5 to 0.7 mm, and then heated at 130°C.
The desulfurization and denitrification agent of the present invention was obtained by heat treatment for 2 hours. Table 4 shows the results of performance tests and measurements conducted on these agents under the same conditions as in the previous example. Comparative Example Using only coal ash and slaked lime without adding water-soluble alkaline earth metal salts or alkali metal compounds, Examples 3-
A crushed cured product was obtained by the same operation as in 4. Performance tests and measurement results conducted under the same conditions as in the Examples are shown in Table 4. Reference Examples 1-2 Commercially available slaked lime, silicic acid, aluminum hydroxide, and a calcium sulfate aqueous solution containing water equivalent to 30% of the water in the final mixture as a water-soluble alkaline earth metal salt were prepared in the formulation shown in Table 4. mix and mix,
Add water to make the moisture content 41 parts per 100 parts of raw material dry matter, mix again, steam cure at normal pressure 100℃ for 6 hours, and crush the obtained cured product to have a particle size of 0.5 to 0.7 mm.
The mixture was heated at 130°C for 2 hours to obtain granules. The silicic acid and aluminum hydroxide used almost correspond to the composition of the coal ash in the example. Table 4 shows the results of performance tests and measurements conducted on these under the same conditions as in the previous example. Reference Examples 3 to 4 Commercially available slaked lime, silicic acid, aluminum hydroxide, and a caustic soda aqueous solution containing water equivalent to 30% of the water in the final mixture as the alkali metal compound
Mix according to the formulation shown in the table, add water to make the moisture content 41 parts per 100 parts of raw material dry matter, mix again, perform steam curing at normal pressure 100°C for 6 hours, and crush the obtained cured product. and adjust the particle size to 0.5 to 0.7 mm.
A granule was obtained by heat treatment at 130°C for 2 hours. The silicic acid and aluminum hydroxide used are approximately equivalent to the composition of the coal ash in the example. Table 4 shows the results of performance tests and measurements conducted on these under the same conditions as in the previous example. Table 4 shows that the alkaline earth metal salts or alkali metal compounds used as raw materials in this application significantly improve the performance of coal ash/lime-based absorbents, unlike the alkali metal compounds (2% as oxides) in coal ash. This is thought to improve the situation.
【表】【table】
【表】
＊ 蒸気養生後熱処理することなくそのまま試験した
もの
〔発明の効果〕
本発明の方法になる脱硫脱硝剤は、石炭灰、石
灰および水溶性アルカリ土類金属塩またはアルカ
リ金属化合物を使用し、混合、湿空養生または蒸
気養生程度の簡単な工程で製造することができる
のでコストは低く廃棄物を活用することができる
ため資源化技術としても有用である。また、脱硫
と脱硝を同時に行うことができ、その性能も優れ
ているので公害防止に寄与するところ極めて大で
ある。[Table] * Tested as is without heat treatment after steam curing [Effects of the invention] The desulfurization and denitrification agent used in the method of the present invention uses coal ash, lime, and water-soluble alkaline earth metal salts or alkali metal compounds. Since it can be manufactured through a simple process of mixing, moist air curing or steam curing, the cost is low and waste can be utilized, making it useful as a resource recycling technology. In addition, desulfurization and denitrification can be performed at the same time, and the performance is excellent, so it greatly contributes to pollution prevention.
Claims (1)
属塩またはアルカリ金属化合物を水と混合した
後、湿空養生および／または蒸気養生することを
特徴とする脱硫脱硝剤の製造方法。 ２ 石炭灰、石灰および水溶性アルカリ土類金属
塩またはアルカリ金属化合物を水と混合した後、
湿空養生および／または蒸気養生し、30℃以上の
温度で熱処理することを特徴とする脱硫脱硝剤の
製造方法。[Claims] 1. Production of a desulfurization and denitrification agent characterized by mixing coal ash, lime, and a water-soluble alkaline earth metal salt or alkali metal compound with water, followed by moist air curing and/or steam curing. Method. 2. After mixing coal ash, lime and water-soluble alkaline earth metal salt or alkali metal compound with water,
A method for producing a desulfurization and denitrification agent, which comprises humid air curing and/or steam curing, and heat treatment at a temperature of 30°C or higher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61056063A JPS62213842A (en) | 1986-03-15 | 1986-03-15 | Preparation of desulfurizing and denitrating agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61056063A JPS62213842A (en) | 1986-03-15 | 1986-03-15 | Preparation of desulfurizing and denitrating agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62213842A JPS62213842A (en) | 1987-09-19 |
| JPH044015B2 true JPH044015B2 (en) | 1992-01-27 |
Family
ID=13016623
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61056063A Granted JPS62213842A (en) | 1986-03-15 | 1986-03-15 | Preparation of desulfurizing and denitrating agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62213842A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5047221A (en) * | 1986-11-07 | 1991-09-10 | Board Of Regents, The University Of Texas System | Processes for removing sulfur from sulfur-containing gases |
| US5270015A (en) * | 1986-11-07 | 1993-12-14 | Board Of Regents, The University Of Texas System | Apparatus for removing sulfur from sulfur containing gases |
| US4931264A (en) * | 1986-11-07 | 1990-06-05 | Board Of Regents, The University Of Texas System | Process for removing sulfur from sulfur-containing gases |
| US4804521A (en) * | 1986-11-07 | 1989-02-14 | Board Of Regents, The University Of Texas System | Process for removing sulfur from sulfur-containing gases |
| US5047222A (en) * | 1986-11-07 | 1991-09-10 | Board Of Regents, The University Of Texas System | Process for removing sulfur from sulfur-containing gases: high calcium fly-ash |
| US5100643A (en) * | 1988-03-02 | 1992-03-31 | Board Of Regents, The University Of Texas System | Processes for removing acid components from gas streams |
| JPH03101812A (en) * | 1987-12-09 | 1991-04-26 | Yoshio Kobayashi | Method for dry-purifying waste gas |
| JP2629042B2 (en) * | 1989-03-14 | 1997-07-09 | 北海道電力 株式会社 | Method for producing exhaust gas treating agent |
| US6099816A (en) * | 1996-07-24 | 2000-08-08 | Dravo Lime, Inc. | Process for desulfurizing a sulfur-dioxide containing gas |
-
1986
- 1986-03-15 JP JP61056063A patent/JPS62213842A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62213842A (en) | 1987-09-19 |
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