JPH0425045B2 - - Google Patents
Info
- Publication number
- JPH0425045B2 JPH0425045B2 JP61078136A JP7813686A JPH0425045B2 JP H0425045 B2 JPH0425045 B2 JP H0425045B2 JP 61078136 A JP61078136 A JP 61078136A JP 7813686 A JP7813686 A JP 7813686A JP H0425045 B2 JPH0425045 B2 JP H0425045B2
- Authority
- JP
- Japan
- Prior art keywords
- cwm
- coal
- particles
- particle size
- slurry
- 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
- 239000002245 particle Substances 0.000 claims description 61
- 239000003245 coal Substances 0.000 claims description 40
- 239000011362 coarse particle Substances 0.000 claims description 22
- 239000002002 slurry Substances 0.000 claims description 21
- 238000001914 filtration Methods 0.000 claims description 12
- 239000002904 solvent Substances 0.000 claims description 4
- 239000011268 mixed slurry Substances 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 14
- 239000010419 fine particle Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 239000000654 additive Substances 0.000 description 9
- 238000002156 mixing Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000003610 charcoal Substances 0.000 description 5
- 230000001186 cumulative effect Effects 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 239000006185 dispersion Substances 0.000 description 4
- 238000010298 pulverizing process Methods 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011882 ultra-fine particle Substances 0.000 description 1
Landscapes
- Filtration Of Liquid (AREA)
- Liquid Carbonaceous Fuels (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は固定粒子が溶媒に分散した系、所謂分
散系において、分散粒子の最大粒径を抑えるため
の濾過方法に関するものであり、分散粒子の種類
によらず濾過速度を高めることができ、濾過効率
を向上するものである。特に本発明では石炭を水
及び界面活性剤などの添加剤と共にミルで湿式粉
砕することにより高濃度で低粘性の石炭水スラリ
を製造する方法において、製造されたCWM中の
不要な粗粒を効率よく除き、最大粒径を抑制する
方法を開示するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a filtration method for suppressing the maximum particle size of dispersed particles in a system in which fixed particles are dispersed in a solvent, a so-called dispersion system. The filtration speed can be increased regardless of the type of filter, and the filtration efficiency can be improved. In particular, in the present invention, unnecessary coarse particles in the produced CWM are efficiently removed in a method for producing a highly concentrated, low-viscosity coal-water slurry by wet-pulverizing coal in a mill together with water and additives such as surfactants. The present invention discloses a method for suppressing the maximum particle size.
本発明が対象の１つとする石炭水スラリは石
炭、水、界面活性剤、アルカリ物質などの添加剤
よりなる混合物であり、スラリ中の石炭濃度が
60wt％以上好ましくは65wt％以上でありその粘
度が4000cp以下好ましくは2000cp以下のもので
ある。
Coal-water slurry, which is one of the objects of the present invention, is a mixture of coal, water, surfactants, and additives such as alkaline substances, and the coal concentration in the slurry is
The content is 60 wt% or more, preferably 65 wt% or more, and the viscosity is 4000 cp or less, preferably 2000 cp or less.
このような高濃度でかつ流動性の高い石炭水ス
ラリ（Coal Water Mxture、以下CWMと称す
る）を製造するための必要条件は特表昭56−
501568号公報、特表昭58−501183号公報及び特開
昭54−16511号公報に開示されている。その内容
は石炭を粉砕して(1)式で示される粒径分布に調整
し、しかも3μｍ以下のコロイド粒子を5wt％以上
とすることによりCWMを製造
Ｒ＝Dn−DS n／DL n−DS n×100 ……(1)
但し
Ｒ：篩下累積重量割合（wt％）
Ｄ：粒径（μｍ）
DL：最大粒径（μｍ）
DS：最小粒径（μｍ）
するものである。(1)式で示される粒径分布は、粗
粒と微粒を含有する幅広い粒径分布である。この
分布を有するCWMを製造する方法は大きく分け
て２つ考えられる。 The necessary conditions for producing such a highly concentrated and highly fluid coal water slurry (hereinafter referred to as CWM) are specified in the Special
It is disclosed in Japanese Patent Publication No. 501568, Japanese Patent Application Publication No. 58-501183, and Japanese Patent Application Laid-open No. 16511-1983. The content is to produce CWM by pulverizing coal and adjusting the particle size distribution shown by equation (1), and making colloidal particles of 3 μm or less more than 5 wt%. R=D n −D S n /D L n −D S n ×100 ……(1) However, R: Cumulative weight ratio under sieve (wt%) D: Particle size (μm) D L : Maximum particle size (μm) D S : Minimum particle size (μm) It is something. The particle size distribution represented by equation (1) is a wide particle size distribution that includes coarse particles and fine particles. There are roughly two possible methods for manufacturing a CWM having this distribution.
第１は特開昭58−173193号公報に開示されてい
る内容に代表される。その内容は平均粒径が20〜
200μｍの大きな石炭粒子と、平均粒径が10μｍの
超微砕石炭粒子とを別々の粉砕機で製造したの
ち、これらに水及び添加剤を加えて、さらに高せ
ん断力を与えて混合分散処理するものである。該
公報に示された技術では前記の大きな石炭粒子を
製造するためにハンマーミルなどを使用すること
が開示されているが、このようなミルは一般的に
粗粉砕に適するものである。これを用いて前記の
ように平均粒径20〜200μｍの石炭粒子を製造し
た場合500μｍ以上の粒子が必ず含有されるので、
製品CWM中には500μｍ以上の粗大粒子が存在す
ることになる。このような粗大粒子は燃焼効率を
低下させるため除去する必要がある。 The first one is typified by the content disclosed in Japanese Patent Application Laid-open No. 173193/1983. Its contents have an average particle size of 20~
After producing large coal particles of 200 μm and ultra-fine coal particles with an average particle size of 10 μm in separate pulverizers, water and additives are added to them, and a high shear force is applied to mix and disperse them. It is something. The technique disclosed in this publication discloses the use of a hammer mill or the like to produce the above-mentioned large coal particles, but such a mill is generally suitable for coarse pulverization. If coal particles with an average particle size of 20 to 200 μm are produced using this as described above, particles with a diameter of 500 μm or more will always be contained.
Coarse particles of 500 μm or more are present in the product CWM. Such coarse particles need to be removed because they reduce combustion efficiency.
第２の方法は特開昭58−206688号公報に開示さ
れている内容に代表される。その内容は石炭を粗
粉砕したのち、これを水、添加剤と共に湿式ボー
ルミルに導入して微粉砕し、CWMを製造するも
のである。ボールミルは主に摩擦粉砕を行うもの
なので粗大粒子の微細化が進行しにくい。またボ
ールミル内は完全混合と考えられるのでミル入口
より供給された粗粒の一部はそのままミルから排
出されてしまう。このような理由でボールミルで
製造したCWM中には500μｍ以上の粗粒が多く含
有されている。前述したように500μｍ以上の石
炭粒子は燃焼し難いため除去する必要がある。こ
のため特開昭58−206688号公報ではボールミルの
あとにストレーナと言われる濾過機を設置し不要
な粗粒を除去するシステムを開示している。 The second method is typified by the content disclosed in Japanese Patent Application Laid-Open No. 58-206688. The process involves coarsely pulverizing coal, then introducing it into a wet ball mill along with water and additives to finely pulverize it to produce CWM. Since ball mills mainly perform friction grinding, it is difficult to refine coarse particles. Furthermore, since it is considered that there is complete mixing inside the ball mill, a portion of the coarse grains supplied from the mill inlet are discharged from the mill as they are. For this reason, CWM produced using a ball mill contains many coarse particles of 500 μm or more. As mentioned above, coal particles larger than 500 μm are difficult to burn and must be removed. For this reason, Japanese Patent Application Laid-Open No. 58-206688 discloses a system in which a filter called a strainer is installed after the ball mill to remove unnecessary coarse particles.
上記特開昭58−173193号公報、特開昭58−
206688号公報に開示された方法により製造した
CWM中には前記の理由で不要な粗粒が混入して
いる。これを除去するためには製造したCWMを
濾過して最大粒径を所定粒径以下となるよう調整
する方法が考えられる。しかしCWMは高濃度で
あり流動性はあるものの水などに比較すると粘度
はかなり高いためにスクリーンの目詰りを生じ効
率よく濾過するのは困難である。
The above-mentioned Japanese Patent Application Publication No. 173193, Japanese Patent Application Publication No. 1983-
Manufactured by the method disclosed in Publication No. 206688
Unnecessary coarse particles are mixed into CWM for the reasons mentioned above. In order to remove this, a method of filtering the manufactured CWM and adjusting the maximum particle size to a predetermined particle size or less can be considered. However, although CWM is highly concentrated and has fluidity, it has a considerably higher viscosity than water, which clogs screens and makes it difficult to filter efficiently.
そこで本発明の目的は固体粒子が溶媒に分散し
た系、所謂分散系において、分散粒子の最大粒径
を所定粒径以下となるよう調整するために有効な
濾過方法を提案するにある。特にCWM中の不要
な粗粒を容易に除去し、最大粒径を効率よく調整
することにある。 Therefore, an object of the present invention is to propose an effective filtration method for adjusting the maximum particle size of dispersed particles to a predetermined particle size or less in a system in which solid particles are dispersed in a solvent, a so-called dispersion system. In particular, the aim is to easily remove unnecessary coarse particles in CWM and efficiently adjust the maximum particle size.
上記目的は、500μｍ以上の粗粒が混在する固
体粒子（石炭粒子）を溶媒に分散させてスラリと
なし、このスラリに、このスラリと同質の固体粒
子を含有し、かつ、固体粒子の重量平均径が前記
スラリの固体粒子の重量平均径よりも小さいスラ
リを添加混合して粒径分布指数を0.65以下にし、
しかるのち、混合されたスラリをスクリーンに通
して濾過し500μｍ以上の粗粒をスクリーン上に
滞留させて分離することにより達成される。
The above purpose is to disperse solid particles (coal particles) mixed with coarse particles of 500 μm or more in a solvent to form a slurry, and to make this slurry contain solid particles of the same quality as this slurry, and to have a weight average of the solid particles. Adding and mixing a slurry whose diameter is smaller than the weight average diameter of the solid particles of the slurry to make the particle size distribution index 0.65 or less,
Thereafter, the mixed slurry is filtered through a screen, and coarse particles of 500 μm or more are retained on the screen and separated.
微粒子量が少ないCWMは、もともとスクリー
ン透過性が高い微粒のみがスクリーンを通過し、
粗粒はスクリーン上に滞留し次第に架橋構造を形
成しスクリーンの目を閉塞させる。微粒子量が多
いCWMは微粒子が流れを形成しながらスクリー
ンを通過するため、粗粒もこの流れにのつてスク
リーンを通過する。従つて透過速度が高く粗粒の
架橋構造も形成されないで閉塞は生じない。
With CWM, which has a small amount of fine particles, only fine particles that have high screen permeability will pass through the screen.
Coarse particles stay on the screen and gradually form a crosslinked structure, blocking the holes in the screen. In CWM, which has a large amount of fine particles, the fine particles pass through the screen while forming a flow, so coarse particles also pass through the screen along with this flow. Therefore, the permeation rate is high and no coarse cross-linked structure is formed and no clogging occurs.
本発明に基づく高効率濾過方法の基本的概念を
第１図に示す。
The basic concept of the high efficiency filtration method based on the present invention is shown in FIG.
タンク２に貯えられているスラリＡはポンプ３
Ａにより混合タンク４に供給される。またタンク
１に貯えられているスラリＢはポンプ３Ｂにより
混合タンク４に供給される。混合されたスラリ
Ａ，Ｂはポンプ３Ｃによりストレーナ等の濾過機
５に供給されたのち粗粒と微粒に分離される。 Slurry A stored in tank 2 is pumped to pump 3
A is supplied to the mixing tank 4. Further, slurry B stored in tank 1 is supplied to mixing tank 4 by pump 3B. The mixed slurries A and B are supplied to a filter 5 such as a strainer by a pump 3C, and then separated into coarse particles and fine particles.
本発明をCWM製造プラントに応用した場合の
概念図を第２図に示す。石炭バンガー２１に貯蔵
されている石炭は粗粉砕機２２に供給されて粗粉
砕されたのちチユーブミル２５に供給される。一
方タンク２３内の水及び添加剤はポンプ２４でチ
ユーブミル２５に供給される。チユーブミル２５
で製造されたCWMは回収タンク２６に一時保管
されたのちその一部はポンプ２８で微粉砕機２７
に供給されて超微粒子にされる。該超微粒CWM
はポンプ２８で混合タンク２９に供給され、ここ
ん回収タンク２６内のCWMと混合されたのち、
ポンプ３０で濾過機３１に供給される。濾過機３
１で分離された粗粒はポンプ３３でミル２５の入
口に戻され再粉砕される。一方粗粒を除去された
CWMは製品タンク３２に貯蔵される。 FIG. 2 shows a conceptual diagram when the present invention is applied to a CWM manufacturing plant. The coal stored in the coal banger 21 is supplied to a coarse crusher 22 and coarsely crushed, and then supplied to a tube mill 25. On the other hand, water and additives in the tank 23 are supplied to a tube mill 25 by a pump 24. tube mill 25
The CWM manufactured in
is supplied to ultrafine particles. The ultra-fine CWM
is supplied to a mixing tank 29 by a pump 28, where it is mixed with CWM in a recovery tank 26, and then
It is supplied to a filter 31 by a pump 30. Filter machine 3
The coarse particles separated in step 1 are returned to the inlet of mill 25 by pump 33 and are re-pulverized. On the other hand, coarse grains were removed
CWM is stored in product tank 32.
粗粉砕機２２で粉砕された石炭を水、添加剤と
混合したのち微粉砕機２７に直接供給することも
可能であり、この場合粉砕動力の低減が見込まれ
る。 It is also possible to mix the coal crushed by the coarse crusher 22 with water and additives and then supply it directly to the fine crusher 27, in which case a reduction in the crushing power is expected.
次に本発明をするに到つた技術的根拠を詳述す
る。 Next, the technical basis for achieving the present invention will be explained in detail.
本発明者らはCWMを製造するために第３図に
示した従来プロセスを用い、数種類の石炭につい
て製造実験を行つた。第３図では石炭バンカ４１
に貯蔵された石炭は粗粉砕機４２で粉砕されたの
ちチユーブミル４５に供給される。一方タンク４
３より水、添加剤がポンプ４４によりチユーブミ
ル４５に供給される。チユーブミル４５で石炭は
水や添加剤と共に湿式粉砕されて回収タンク４６
に貯蔵される。該CWMはポンプ４７でストレー
ナ４８に供給される。分離された粗粒はポンプ５
０でミル４５に戻され再粉砕される。粗粒が除去
されたCWMはタンク４９に貯蔵される。Ａ炭、
Ｂ炭、Ｃ炭の３種類の石炭を用いて第３図のプロ
セスでCWMを製造したところタンク４６内のそ
れぞれのCWMの粒径分布は第４図となつてい
た。 The present inventors used the conventional process shown in FIG. 3 to produce CWM, and conducted production experiments using several types of coal. In Figure 3, coal bunker 41
The coal stored in the pulverizer 42 is pulverized by a coarse pulverizer 42 and then supplied to a tube mill 45. On the other hand tank 4
3, water and additives are supplied to a tube mill 45 by a pump 44. The coal is wet-pulverized together with water and additives in tube mill 45 and sent to recovery tank 46.
stored in The CWM is supplied to a strainer 48 by a pump 47. The separated coarse particles are pumped to pump 5.
At 0, it is returned to the mill 45 and re-pulverized. The CWM from which coarse particles have been removed is stored in a tank 49. A charcoal,
When CWM was manufactured by the process shown in FIG. 3 using three types of coal, B coal and C coal, the particle size distribution of each CWM in the tank 46 was as shown in FIG. 4.
同じ条件で粉砕したにも拘らず石炭によつて粒
径分布が異なるのはそれぞれの硬度の相異による
ものである。これらのCWM中には石炭粒子を高
分散化するための添加剤が最適量加えられている
のでCWMの流動性は高く粘度はいずれも1000cp
程度である。ところがそれぞれのCWMを第３図
のストレーナ４８に供給して濾過するとＣ炭が閉
塞して濾過不能となることが明らかとなつた。こ
れに対しＡ炭、Ｂ炭は閉塞を起さずストレーナの
連続運転が可能であつた。本発明者らはストレー
ナの閉塞はCWMのスクリーン透過性に起因する
ものと考え第５図のような試験装置を用いて
CWMのスクリーン透過速度を測定した。第５図
では、スクリーン５１にCWM５７を入れたのち
スクレーパ５４を回転させて、透過するCWM５
６を回収パツト５５で受け累積透過率を測定し
た。第６図に実験結果を示す。Ｃ炭CWMは透過
速度が遅く、これがストレーナ閉塞の原因である
ことが明らかとなつた。この結果を第４図の粒径
分布とを合せ考慮すると微粒が多いCWMほど透
過速度が高くなつていることが分る。第４図の粒
径分布を対数プロツトするとほぼ直線となるので
その傾きを粒径分布指数と定義し、これと透過速
度との関係を第７図に示す。透過速度は第６図の
原点における接線の傾きと定義した。分布指数が
小さいほど透過速度は高くなる。第７図にはＡ〜
Ｃ炭以外の種々の石炭CWMのデータも追記して
おり特に分布指数ｎが0.65以下のCWMはストレ
ーナ閉塞を起こさなかつた。従つてストレーナ閉
塞を防止するにはｎ≦0.65とする必要がある。 The reason why the particle size distribution differs depending on the coal even though it is pulverized under the same conditions is due to the difference in hardness of each coal. These CWMs contain an optimal amount of additives to highly disperse coal particles, so the CWMs have high fluidity and a viscosity of 1000 cp.
That's about it. However, it has become clear that when each CWM is supplied to the strainer 48 shown in FIG. 3 and filtered, the C charcoal becomes clogged and filtering becomes impossible. On the other hand, with Coal A and Coal B, continuous operation of the strainer was possible without causing blockage. The inventors believed that the strainer blockage was caused by the screen permeability of the CWM, and used a test device as shown in Figure 5.
The screen penetration rate of CWM was measured. In FIG. 5, the CWM 57 is inserted into the screen 51, the scraper 54 is rotated, and the CWM 57 is transmitted through the screen 51.
6 was received by the collection pad 55 and the cumulative transmittance was measured. Figure 6 shows the experimental results. It was revealed that C charcoal CWM had a slow permeation rate, which was the cause of strainer blockage. Considering this result together with the particle size distribution shown in Figure 4, it can be seen that the more fine particles the CWM has, the higher the permeation rate. When the particle size distribution shown in FIG. 4 is plotted logarithmically, it becomes a substantially straight line, and its slope is defined as the particle size distribution index, and the relationship between this and the permeation rate is shown in FIG. The permeation rate was defined as the slope of the tangent at the origin in FIG. The smaller the distribution index, the higher the permeation rate. Figure 7 shows A~
Data on CWM of various coals other than C coal are also added, and in particular, CWM with a distribution index n of 0.65 or less did not cause strainer blockage. Therefore, to prevent strainer clogging, it is necessary to satisfy n≦0.65.
このように高分散化された分散系では微粒子量
が多いスラリほどスクリーン透過速度が高く、こ
のためストレーナなどの濾過機による濾過効率が
高くその閉塞頻度は少くなる。 In such a highly dispersed dispersion system, the slurry with a larger amount of fine particles has a higher screen permeation rate, and therefore the filtration efficiency of a filter such as a strainer is higher and the frequency of clogging thereof is lower.
その理由を第８図のスクリーン透過モデルで示
した。Ｃ炭CWMのように微粒子量が少いもの
は、第８図ａのようにもともとスクリーン透過性
が高い微粒のみがスクリーンを通過し、粗粒はス
クリーン上に滞留し次第に架橋構造を形成しスク
リーンの目を閉塞させる。一方Ａ炭CWMのよう
に微粒子量が多いものは第８図ｂのように微粒子
が流れを形成しながらスクリーンを通過するた
め、粗粒もこの流れにのつてスクリーンを通過す
る。従つて透過速度が高く粗粒の架橋構造も形成
されないので閉塞は生じない。 The reason for this is shown in the screen transmission model in Figure 8. In the case of carbon CWM with a small amount of fine particles, as shown in Figure 8a, only the fine particles that originally have high screen permeability pass through the screen, and the coarse particles stay on the screen and gradually form a crosslinked structure and pass through the screen. block the eyes of On the other hand, in the case of coal A with a large amount of fine particles such as CWM, the fine particles pass through the screen while forming a flow as shown in Fig. 8b, so coarse particles also pass through the screen along with this flow. Therefore, the permeation rate is high and no coarse crosslinked structure is formed, so no clogging occurs.
本発明者らは以上のように微粒子がCWMのス
クリーン透過速度を高める効果を見出しその利用
法を本発明により開示した。 As described above, the present inventors have discovered the effect of fine particles on increasing the screen penetration rate of CWM, and have disclosed a method for utilizing the same according to the present invention.
発明の実施例 １
ストレーナの閉塞を起こしたＣ炭CWMを用い
て、第２図で示したプロセスに従いスクリーン透
過性の高いCWMを製造した。Example 1 of the Invention A CWM with high screen permeability was produced using a C-charcoal CWM whose strainer was clogged according to the process shown in FIG.
第９図に供試CWMの粒径分布を示した。第９
図内Ｃ炭−１は、第２図内チユーブミル２５で製
造された直後のCWMの粒径分布である。第９図
内Ｃ炭−２は、第２図内微粉砕機２７で製造され
た直後のCWMの粒径分布を示す。第９図内Ｃ炭
−３は、第２図内混合タンク２９で混合された直
後のCWMの粒径分布である。 Figure 9 shows the particle size distribution of the sample CWM. 9th
Charcoal C-1 in the figure shows the particle size distribution of CWM immediately after being produced in the tube mill 25 in Figure 2. Coal C-2 in FIG. 9 shows the particle size distribution of CWM immediately after being produced in the pulverizer 27 in FIG. Coal C-3 in Figure 9 shows the particle size distribution of CWM immediately after being mixed in the mixing tank 29 in Figure 2.
第９図内Ｃ炭−１は、第３図に示される従来法
で製造されたCWMと同じ粒径分布を有するもの
で、その粒径分布指数は0.66である。第９図内Ｃ
炭−３は、本発明により製造したCWMで濃度は
Ｃ炭−１と同じでその粒径分布指数は0.45であ
る。第１０図に累積透過率の時間変化を示した。
Ｃ炭−３の透過速度はＣ炭−１に比較して約３倍
となることがわかつた。またこの場合、第２図の
本発明によるプロセスにおけるストレーナは閉塞
が生じなかつた。 Coal C-1 in FIG. 9 has the same particle size distribution as the CWM manufactured by the conventional method shown in FIG. 3, and its particle size distribution index is 0.66. Figure 9 C
Charcoal-3 is CWM produced according to the present invention, has the same concentration as C-charcoal-1, and has a particle size distribution index of 0.45. Figure 10 shows the change in cumulative transmittance over time.
It was found that the permeation rate of C Coal-3 was approximately three times that of C Coal-1. Also in this case, the strainer in the process according to the invention of FIG. 2 did not become clogged.
本発明によれば濾過時の透過性が向上し、分散
系の最大粒径の調整が容易に効率よく行うことが
できる。
According to the present invention, the permeability during filtration is improved, and the maximum particle size of the dispersion system can be easily and efficiently adjusted.
第１図は本発明のスラリの高効率濾過方法の基
本的概念を示す系統図、第２図は本発明を高濃度
石炭水スラリ製造プロセスに応用した場合の基本
的概念を示す系統図、第３図は従来の高濃度石炭
水スラリ製造プロセスの系統図、第４図はCWM
中の石炭粒子の粒径分布を示す線図、第５図はス
トレーナ模擬試験装置の説明図、第６図はCWM
の累積透過率と透過時間との関係を示す線図、第
７図はCWMの初期透過速度と粒径分布指数との
関係を示す線図、第８図ａ，ｂはCWMの各粒子
がスクリーンを透過するときの説明図、第９図は
CWM中の石炭粒子の粒径分布を示す線図、第１
０図はCWMの累積透過率と透過時間との関係を
示す線図である。
１〜２……タンク、３Ａ〜３Ｃ……ポンプ、４
……混合タンク、５……濾過機、２２……粗粉砕
機、２７……微粉砕機、２９……混合タンク、３
１……濾過機。
Fig. 1 is a system diagram showing the basic concept of the highly efficient slurry filtration method of the present invention, Fig. 2 is a system diagram showing the basic concept when the present invention is applied to a high concentration coal water slurry production process, Figure 3 is a system diagram of the conventional high-concentration coal-water slurry manufacturing process, and Figure 4 is CWM.
Diagram showing the particle size distribution of coal particles inside, Figure 5 is an explanatory diagram of strainer simulation test equipment, Figure 6 is CWM
Figure 7 is a diagram showing the relationship between the cumulative transmittance and penetration time of CWM, Figure 7 is a diagram showing the relationship between the initial transmission rate of CWM and particle size distribution index, and Figure 8 a and b are diagrams showing the relationship between each particle of CWM and the screen. The explanatory diagram when transmitting, Figure 9 is
Diagram showing particle size distribution of coal particles in CWM, 1st
Figure 0 is a diagram showing the relationship between cumulative transmittance and transmission time of CWM. 1-2...Tank, 3A-3C...Pump, 4
...Mixing tank, 5...Filter, 22...Coarse grinder, 27...Fine grinder, 29...Mixing tank, 3
1...filter.
Claims (1)
を溶媒に分散させてスラリとなし該スラリをスク
リーンに通し500μｍ以上の粗粒を該スクリーン
上に滞留させて分離する濾過方法において、前記
スラリと同質の石炭粒子を含有し該石炭粒子の重
量平均径が前記スラリ中の石炭粒子の重量平均径
よりも小さいスラリを前記スラリに添加混合して
石炭粒子の粒径分布指数を0.65以下となし、混合
されたスラリを前記スクリーンに通して濾過し
500μｍ以上の粗粒を分離するようにしたことを
特徴とするスラリの高効率濾過方法。1. In a filtration method in which coal particles containing coarse particles with a particle size of 500 μm or more are dispersed in a solvent to form a slurry, the slurry is passed through a screen, and the coarse particles with a particle size of 500 μm or more are retained on the screen and separated. A slurry containing homogeneous coal particles and having a weight average diameter of the coal particles smaller than the weight average diameter of the coal particles in the slurry is added and mixed to the slurry so that the particle size distribution index of the coal particles is 0.65 or less, Filter the mixed slurry through the screen.
A highly efficient slurry filtration method characterized by separating coarse particles of 500 μm or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61078136A JPS62237918A (en) | 1986-04-07 | 1986-04-07 | High efficiency filteration of slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61078136A JPS62237918A (en) | 1986-04-07 | 1986-04-07 | High efficiency filteration of slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62237918A JPS62237918A (en) | 1987-10-17 |
| JPH0425045B2 true JPH0425045B2 (en) | 1992-04-28 |
Family
ID=13653464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61078136A Granted JPS62237918A (en) | 1986-04-07 | 1986-04-07 | High efficiency filteration of slurry |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62237918A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4869162A (en) * | 1971-12-22 | 1973-09-20 | ||
| JPS4993961A (en) * | 1973-01-13 | 1974-09-06 |
-
1986
- 1986-04-07 JP JP61078136A patent/JPS62237918A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4869162A (en) * | 1971-12-22 | 1973-09-20 | ||
| JPS4993961A (en) * | 1973-01-13 | 1974-09-06 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62237918A (en) | 1987-10-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1188517A (en) | Aqueous phase continuous, coal fuel slurry and a method of its production | |
| JPS588719B2 (en) | Method of transporting coal by deashing and granulating it | |
| DE3537485A1 (en) | METHOD FOR ASHING COAL | |
| JPH0425045B2 (en) | ||
| JPH04220494A (en) | Manufacture of highly concentrated coal/water slurry | |
| CN110607195B (en) | Preparation method of coarse particle pipeline transportation coal slurry | |
| JPS6152199B2 (en) | ||
| EP0223573B1 (en) | Method of preparing fine-particle high-loaded coal-water slurry | |
| JPH0259197B2 (en) | ||
| JPH0323591B2 (en) | ||
| JPH04372691A (en) | Production of highly concentrated aqueous slurry of coal | |
| JPH0464640B2 (en) | ||
| JPS601289A (en) | Deashing of coal | |
| JPH0352788B2 (en) | ||
| JPH0367117B2 (en) | ||
| JPS6227050A (en) | Method for crushing coal slurry | |
| JP3277202B2 (en) | Coal liquefaction method | |
| JPS60212490A (en) | Deashing of concentrated aqueous slurry of coal | |
| JPS5980322A (en) | Granulation of coal | |
| JPS6323992A (en) | Production of highly concentrated coal/water slurry by wet process | |
| JPH0637628B2 (en) | Method for preparing coal slurry | |
| JPH0155315B2 (en) | ||
| JPS63145395A (en) | Apparatus for producing coal-water slurry | |
| JPH01178595A (en) | Production of high-concentration coal/water slurry | |
| JPS62158793A (en) | Production of deashed and highly concentrated coal-water slurry |