JPS63229189A - Removal of sulfate radical in coal ash - Google Patents
Removal of sulfate radical in coal ashInfo
- Publication number
- JPS63229189A JPS63229189A JP62061344A JP6134487A JPS63229189A JP S63229189 A JPS63229189 A JP S63229189A JP 62061344 A JP62061344 A JP 62061344A JP 6134487 A JP6134487 A JP 6134487A JP S63229189 A JPS63229189 A JP S63229189A
- Authority
- JP
- Japan
- Prior art keywords
- coal ash
- slurry
- water
- elution
- sulfate radicals
- 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.)
- Pending
Links
- 239000010883 coal ash Substances 0.000 title claims abstract description 47
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000002002 slurry Substances 0.000 claims abstract description 20
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000010828 elution Methods 0.000 abstract description 19
- 230000001678 irradiating effect Effects 0.000 abstract description 2
- YPNVIBVEFVRZPJ-UHFFFAOYSA-L silver sulfate Chemical compound [Ag+].[Ag+].[O-]S([O-])(=O)=O YPNVIBVEFVRZPJ-UHFFFAOYSA-L 0.000 abstract 2
- 229910000367 silver sulfate Inorganic materials 0.000 abstract 2
- 208000005156 Dehydration Diseases 0.000 abstract 1
- 230000018044 dehydration Effects 0.000 abstract 1
- 238000006297 dehydration reaction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
- Treatment Of Sludge (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は石炭焚発電所等から発生する石炭灰を有効利用
する上で用途によっては障害となる硫酸根を除去する方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for removing sulfate radicals, which may be an obstacle depending on the use of coal ash generated from coal-fired power plants or the like.
［従来の技術］
石炭灰中に含まれる硫酸根を除去するに当り、石炭灰中
の硫酸根を分析するための手段として、従来、次のよう
な方法が一般に知られている。[Prior Art] Conventionally, the following method is generally known as a means for analyzing sulfate radicals in coal ash when removing sulfate radicals contained in coal ash.
すなわら、
■ 石炭灰と水とを混合してなるスラリーを分液ロート
に入れて激しく振り動かし液中に硫酸根を溶出させる方
法、
■ 石炭灰と水のスラリーを容器に入れ、攪拌機で長時
間攪拌して硫酸根を溶出する方法、である。In other words, ■ A method in which a slurry made by mixing coal ash and water is placed in a separatory funnel and shaken vigorously to elute the sulfuric acid radicals into the liquid. ■ A method in which a slurry of coal ash and water is placed in a container and a stirrer is used. This is a method in which sulfate radicals are eluted by stirring for a long time.
上記■、■方法で液中に溶出した硫酸根を除去する場合
は、硫酸根が溶出した液を濾過して、硫酸根が溶出した
が液と脱硫酸根石炭灰とに分離し、炉液は排出させるよ
うにしている。When removing the sulfate radicals eluted into the solution using the above method I'm trying to get it out.
［発明が解決しようとする問題点］
ところが、上記従来の石炭灰中の硫酸根を分析する手段
を工業的に適用した例は未だない。[Problems to be Solved by the Invention] However, there has been no example of industrial application of the conventional means for analyzing sulfate radicals in coal ash.
これは、上記分析手段を工業的に適用しようとした場合
、■の方法では、大量のスラリーに実験室で得られるよ
うな激しい振動糸付を与えなければならないが、このこ
と自体事実上無理であること、■の方法では、装置的に
は問題はないが、長時間の攪拌が不可欠で、硫酸根の液
中への溶出に時間がかかりすぎ、現実的でないこと、等
の理由によるものと考えられる。This is because when trying to apply the above analysis method industrially, method (2) requires applying a violent vibration string to a large amount of slurry, similar to that obtained in a laboratory, which is virtually impossible in itself. Although there is no problem with the equipment in the method (■), it requires long-time stirring, and it takes too much time to elute the sulfate radicals into the solution, making it impractical. Conceivable.
そこで、本発明は、従来実現していなかった石炭灰中の
硫酸根の液中への溶出を可能にし、簡単な方法で且つ短
時間で溶出さけることができるようにしようとするもの
である。Therefore, the present invention aims to make it possible to elute the sulfate radicals in coal ash into the liquid, which has not been achieved in the past, and to make it possible to elute the sulfate radicals in a simple manner and in a short time.
［問題点を解決するための手段］
本発明は、上記目的を達成するために、石炭灰のスラリ
ーを攪拌機で攪拌すると共に該スラリーに超音波を照射
して、石炭灰中の硫酸根を水中に溶出させ、所定時間後
にスラリーを脱水して硫酸根を含む水と脱硫酸根石炭灰
とに分離する方法とする。[Means for Solving the Problems] In order to achieve the above object, the present invention stirs a coal ash slurry with a stirrer and irradiates the slurry with ultrasonic waves to remove sulfate radicals in the coal ash in water. The slurry is eluted after a predetermined period of time, and the slurry is dehydrated to separate it into water containing sulfate radicals and desulfated coal ash.
［作 用］
石炭灰を水中に入れてスラリーとしたものを攪拌すると
同時にスラリーに超音波を照射するので、石炭灰中の硫
酸根が水中に溶出する時間が速くなり、又、溶出率も超
音波照射により増大する。[Function] Coal ash is put into water to form a slurry, and at the same time the slurry is irradiated with ultrasonic waves, the time for the sulfate radicals in the coal ash to elute into the water is accelerated, and the elution rate is also extremely high. Increased by sonic irradiation.
［実 施 例］ 以下、本発明の実施例を図面を参照して説明する。[Example] Embodiments of the present invention will be described below with reference to the drawings.
図は本発明を実ｔＭするための装置の概要を示すもので
、１は石炭灰ビン、２は水タンク、３は溶出装置、４は
溶出装置３内にあってモータ５により回転させられる攪
拌羽根で、溶出装置３内に供給された石炭灰と水とから
なるスラリーを攪拌する。６は溶出装置３内の上記スラ
リーに超音波を照射させる超音波発振機、７は石炭灰中
の硫酸根が溶出した水と石炭灰とを分離する脱水機、８
は硫酸根が除去された脱硫酸根石炭灰、９は硫酸根が含
まれている排水である。The figure shows an outline of a device for putting the present invention into practice, in which 1 is a coal ash bin, 2 is a water tank, 3 is an elution device, and 4 is an agitator located inside the elution device 3 and rotated by a motor 5. The slurry made of coal ash and water supplied into the elution device 3 is stirred by the blade. 6 is an ultrasonic oscillator that irradiates the slurry in the elution device 3 with ultrasonic waves; 7 is a dehydrator that separates coal ash from water in which the sulfate radicals in the coal ash are eluted; 8
9 is desulfated coal ash from which sulfate roots have been removed, and 9 is wastewater containing sulfate roots.
石炭灰ビン１から石炭灰が、又、水タンク２から水がそ
れぞれ溶出装置３内に供給されると、石炭灰は水により
スラリー状になる。石炭灰中の硫酸根の水による溶出速
度は、石炭灰表面近くにおける硫酸根濃度が低いほど速
くなるため、溶出して来た硫酸根を攪拌により石炭灰表
面近くから水金体に積極的に拡散させ、局部的な高濃度
化を防ぐようにする。上記攪拌のみによる場合は、石炭
灰の中に入り込んでいる硫酸根を短時間に溶出させるこ
とができず、短時間に硫酸根を溶出させるためには、石
炭灰そのものに、より効果的な作用を及ぼすことが必要
である。When coal ash is supplied from the coal ash bin 1 and water from the water tank 2 into the elution device 3, the coal ash is turned into a slurry by the water. The rate of elution of sulfate radicals from coal ash by water becomes faster as the concentration of sulfate radicals near the surface of the coal ash decreases, so the eluted sulfate radicals are actively transferred from near the surface of the coal ash to the water metal bodies by stirring. Diffusion to prevent localized high concentrations. If the above-mentioned stirring is used alone, the sulfate radicals that have entered the coal ash cannot be eluted in a short time. It is necessary to exert
本発明では、溶出装置３の容器中に超音波を照射するこ
とにより石炭灰にキャビテーションによる衝撃を与え、
石炭灰内部への水の出入りを積極的に行わせるので、石
炭灰表面近くまで硫酸根を引っ張り出させることができ
、その上で攪拌させるため、攪拌の効果により上記石炭
灰表面近くにおける５ＡＭ根濃度を低くすることができ
る。これにより石炭灰中の硫酸根の溶出時間を速くする
ことができることになる。In the present invention, by irradiating ultrasonic waves into the container of the elution device 3, a cavitation impact is applied to the coal ash,
Since water is actively allowed to enter and exit the coal ash, it is possible to pull out the sulfuric acid roots close to the surface of the coal ash.Since the sulfate roots are then stirred, the 5AM roots near the surface of the coal ash are removed by the effect of stirring. The concentration can be lowered. This makes it possible to speed up the elution time of sulfate radicals in coal ash.
次に、石炭灰のスラリーを攪拌するのみの場合と、本発
明による攪拌と超音波照射の両件用を行わせる場合の硫
酸根の溶出率の比較を説明する。Next, a comparison of the elution rate of sulfate radicals will be explained between a case where the coal ash slurry is only stirred and a case where both stirring and ultrasonic irradiation according to the present invention are performed.
先ず、攪拌のみの場合は、次の条件で行った。First, in the case of stirring only, it was carried out under the following conditions.
溶出装置３の容器： ３００ｒｎ１
攪拌羽根４の径： ４０ｍｎ
攪拌回転数： ｔｏｏｒｙｐ、ｍ
石炭灰の量： ３０ｇ
水 の 量： ２７０ｄ
攪 拌 時 間：１時間
以上の条件で行った結果、硫酸根溶出率は８７％であっ
た。Container of elution device 3: 300rn1 Diameter of stirring blade 4: 40mn Stirring rotation speed: tooryp, m Amount of coal ash: 30g Amount of water: 270d Stirring time: As a result of conducting under conditions of 1 hour or more, sulfate radicals were eluted. The rate was 87%.
これに対し、本発明の方法により攪拌と同時に超音波照
射を、次の条件で行った。On the other hand, according to the method of the present invention, ultrasonic irradiation was performed simultaneously with stirring under the following conditions.
攪拌の条件は、前記攪拌のみの場合の条件と同じにし、
超音波として、２８ｋｌｌｚ／ｓの条件とした。The stirring conditions are the same as those for stirring only,
The ultrasonic wave was set at 28 kllz/s.
上記の条件で超音波を照射し且つ攪拌を行った結果、硫
酸根の溶出率は、９９％であった。As a result of ultrasonic irradiation and stirring under the above conditions, the elution rate of sulfate radicals was 99%.
［発明の効果］
以上述べた如く本発明の方法によれば、石炭灰のスラリ
ーに超音波を照射して石炭灰にキャビテーションによる
衝撃を与え、石炭灰内部への水の出入りを積極的に行わ
せた上で攪拌を行わせるので、石炭灰内部に含まれる硫
酸根を石炭灰表面近くまで引き出した上で攪拌の効果が
付加されるため、ＦＩｔ酸根の溶出率をより向上させる
ことかできると共に、大量の石炭灰でも簡易に取り扱え
短時間に溶出させることができる、という優れた効果を
奏し得る。[Effects of the Invention] As described above, according to the method of the present invention, ultrasonic waves are irradiated to the coal ash slurry to give the coal ash an impact due to cavitation, thereby actively allowing water to enter and exit the coal ash. Since the sulfate radicals contained in the coal ash are brought out close to the surface of the coal ash and the stirring effect is added, the elution rate of FIt acid radicals can be further improved. This method has excellent effects in that even a large amount of coal ash can be easily handled and eluted in a short time.
図は本発明の方法を実施するための装置の概要を示す図
である。
１・・・石炭灰ビン、２・・・水タンク、３・・・溶出
装置、４・・・攪拌羽根、５・・・モータ、６・・・超
音波発振機、７・・・脱水機、８・・・脱硫酸根石炭灰
、９・・・排水。The figure is a diagram showing an outline of an apparatus for carrying out the method of the present invention. 1... Coal ash bin, 2... Water tank, 3... Elution device, 4... Stirring blade, 5... Motor, 6... Ultrasonic oscillator, 7... Dehydrator , 8... Desulfated coal ash, 9... Wastewater.
Claims (1)
リーに超音波を照射し、所定時間後にスラリーを脱水し
て硫酸根の溶出した水と脱硫酸根の石炭灰とに分離し、
上記水は排水することを特徴とする石炭灰中の硫酸根の
除去方法。1) Stir the slurry of coal ash in a container and irradiate the slurry with ultrasonic waves, and after a predetermined time, dehydrate the slurry and separate it into water from which sulfate radicals are eluted and coal ash from which desulfated radicals are dissolved,
A method for removing sulfate radicals from coal ash, characterized in that the water is drained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62061344A JPS63229189A (en) | 1987-03-18 | 1987-03-18 | Removal of sulfate radical in coal ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62061344A JPS63229189A (en) | 1987-03-18 | 1987-03-18 | Removal of sulfate radical in coal ash |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63229189A true JPS63229189A (en) | 1988-09-26 |
Family
ID=13168420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62061344A Pending JPS63229189A (en) | 1987-03-18 | 1987-03-18 | Removal of sulfate radical in coal ash |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63229189A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998025704A1 (en) * | 1996-12-11 | 1998-06-18 | Earth Sciences Limited | Methods and apparatus for use in processing and treating particulate material |
| JP2008114182A (en) * | 2006-11-07 | 2008-05-22 | Mitsubishi Materials Corp | Pulse cleaning method and pulse cleaning apparatus |
| CN102172509A (en) * | 2011-01-25 | 2011-09-07 | 太原理工大学 | Ultrasonic electrolysis dehydrating method for fine coal |
| CN104759451A (en) * | 2015-04-15 | 2015-07-08 | 李海兰 | Integrated system for treating kitchen waste |
-
1987
- 1987-03-18 JP JP62061344A patent/JPS63229189A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998025704A1 (en) * | 1996-12-11 | 1998-06-18 | Earth Sciences Limited | Methods and apparatus for use in processing and treating particulate material |
| GB2320245B (en) * | 1996-12-11 | 2000-11-08 | John Henry Watt | Methods and apparatus for use in processing and treating particulate material |
| JP2008114182A (en) * | 2006-11-07 | 2008-05-22 | Mitsubishi Materials Corp | Pulse cleaning method and pulse cleaning apparatus |
| CN102172509A (en) * | 2011-01-25 | 2011-09-07 | 太原理工大学 | Ultrasonic electrolysis dehydrating method for fine coal |
| CN104759451A (en) * | 2015-04-15 | 2015-07-08 | 李海兰 | Integrated system for treating kitchen waste |
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