JPH02158688A - Production of concentrated coal-water slurry - Google Patents
Production of concentrated coal-water slurryInfo
- Publication number
- JPH02158688A JPH02158688A JP31193688A JP31193688A JPH02158688A JP H02158688 A JPH02158688 A JP H02158688A JP 31193688 A JP31193688 A JP 31193688A JP 31193688 A JP31193688 A JP 31193688A JP H02158688 A JPH02158688 A JP H02158688A
- Authority
- JP
- Japan
- Prior art keywords
- coal
- slurry
- concentration
- water
- cwm
- 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.)
- Granted
Links
- 239000002002 slurry Substances 0.000 title claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 title claims description 8
- 239000003245 coal Substances 0.000 claims abstract description 62
- 239000000654 additive Substances 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 7
- 238000010298 pulverizing process Methods 0.000 claims description 14
- 239000002245 particle Substances 0.000 abstract description 15
- 238000004898 kneading Methods 0.000 abstract description 9
- 238000010008 shearing Methods 0.000 abstract description 5
- 230000000996 additive effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 239000003250 coal slurry Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000000047 product Substances 0.000 description 26
- 239000011362 coarse particle Substances 0.000 description 9
- 238000009826 distribution Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000011882 ultra-fine particle Substances 0.000 description 7
- 239000000295 fuel oil Substances 0.000 description 5
- 230000002411 adverse Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000009193 crawling Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000007420 reactivation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Landscapes
- Liquid Carbonaceous Fuels (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、高品質の石炭水スラリか得られ所要動力の少
い高濃度（石炭濃度６０〜７５％程度）の石炭水スラリ
（以後単にＣＷＭと呼ぶ）の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is directed to a high-concentration (coal concentration of about 60 to 75%) coal-water slurry (hereinafter simply (referred to as CWM).
従来のＣＷＭ！！！造は湿式チューブミルを使用するの
が一般的であり、その代表例を第４図に示す。Conventional CWM! ! ! A wet tube mill is generally used for construction, and a typical example is shown in Fig. 4.
原炭は原炭ホンパー１から排出されて破砕機２により破
砕されて破砕炭ホッパー３に送られ、破砕炭供給ライン
４を通ってボール１０が充填された湿式チューブミル１
３に送られる。湿式チューブミル１３内の石炭濃度は、
粉砕性や製品ＣＷＭ品質に大きな影響を与えるために、
一定にコントロールする必要があるので、破砕炭ホッパ
ー３内の破砕炭の水分量を検知し、これを入力信号ライ
ン８により演算器７に送り、必要な水分供給量が計算さ
れてライン９により水流ｆ［節計１１に与えられて所定
の水量が水供給ライン１２を通ってチューブミル１３に
送られる。また、ＣＷＭの粘度特性を向上させるための
添加剤は、ライン５を通ってチューブミル１３に供給さ
れる。チューブミル１３は、高粘性湿式粉砕を行なうた
めに、ミル出口ＣＷＭ中には、燃焼性や貯蔵性に悪影響
を与える粗粒炭がかなり含まれているので、これを取り
除くためにスクリーン１６を内蔵した分級器Ｉ５に送ら
れ、ここで粗粒ＣＷＭと製品ＣＷＭに分けられ、前者は
ライン６を通って再びチューブミル１３の入口に戻され
、後者はうイン１７を通って製品ＣＷＭ貯藏タンク１８
に送られる。Raw coal is discharged from a raw coal dumper 1, crushed by a crusher 2, sent to a crushed coal hopper 3, and passed through a crushed coal supply line 4 to a wet tube mill 1 filled with balls 10.
Sent to 3. The coal concentration in the wet tube mill 13 is
In order to have a significant impact on crushability and product CWM quality,
Since it is necessary to control the amount of water at a constant level, the amount of moisture in the crushed coal in the crushed coal hopper 3 is detected, and this is sent to the calculator 7 via the input signal line 8. The required amount of moisture supplied is calculated and the water flow is f[A predetermined amount of water is given to the meter 11 and sent to the tube mill 13 through the water supply line 12. Additives for improving the viscosity properties of the CWM are also supplied to the tube mill 13 through line 5. Since the tube mill 13 performs high-viscosity wet pulverization, the mill outlet CWM contains a considerable amount of coarse coal that adversely affects combustibility and storability, so a screen 16 is built in to remove this. The filtered CWM is sent to the classifier I5, where it is separated into coarse CWM and product CWM.
sent to.
上記従来の方法には、次の問題がある。 The above conventional method has the following problems.
（１） 上記従来の方法では、添加剤を加えた状態で
湿式チューブミル１３で湿式粉砕するが、スケールアッ
プするに従ってミル内のスラリー温度が上昇する。ＣＷ
Ｍ用添加剤はある温度以上になると、効果が著しく填わ
れる性質があるので、添加剤の温度制約上からスケール
アップには限界がある。(1) In the above conventional method, the slurry is wet-pulverized in the wet tube mill 13 with additives added, but as the scale is increased, the temperature of the slurry in the mill increases. C.W.
Since the additive for M has a property that its effect is significantly reduced when the temperature exceeds a certain level, there is a limit to scaling up due to the temperature restriction of the additive.
（２） 湿式チューブミル！３で高粘性湿式粉砕を行
なっているので、粗粒が多く、分級してもなお製品のＣ
ＷＭ中にかなりの粗粒が含まれるのが避けられない。(2) Wet tube mill! Since high viscosity wet pulverization is performed in Step 3, there are many coarse particles, and even after classification, the C of the product remains low.
It is inevitable that the WM contains a considerable amount of coarse particles.
（３） 製品ＣＷＭＩ度は、破砕炭水分を検知し、こ
れに基づいて湿式チューブミル１３に水分を供給するこ
とによってコントロールされるが、破砕炭ホッパー内の
破砕炭水分は実際にはかなりバラライでおり、水分の検
知誤差がそのまま製品ＣＷＭＩ度誤差となる。(3) The product CWMI degree is controlled by detecting the moisture content of crushed coal and supplying moisture to the wet tube mill 13 based on this, but the moisture content of crushed coal in the crushed coal hopper actually varies considerably. Therefore, the moisture detection error directly becomes the product CWMI degree error.
（４）石炭性状が変化した場合、特に粉砕性が異る石炭
の場合には、製品ＣＷＭの粒度分布が異って来る。製品
ＣＷＭの粒度は、通常７５ミクロンバス貴、１５０ ミ
クロン残量又は３００ ミクロン残量で規制されること
が多いが、粉砕し易い石炭の場合には前述の粒度が同じ
でも、微粒が出来過ぎて粉砕動力が無駄になるばかりか
、品質にも悪影響を及ぼす場合もある。(4) When the coal properties change, especially when the coal has different grindability, the particle size distribution of the product CWM will change. The particle size of product CWM is usually regulated by 75 microns, 150 microns, or 300 microns, but in the case of coal that is easy to crush, even if the above particle size is the same, too many fine particles may be formed. Not only is the crushing power wasted, but the quality may also be adversely affected.
（５） チューブミルは竪型ローラミルよりも所要動
力が高く、かつ高粘性スラリーの粉砕を行っているため
に一層所要動力が高くなり、経済的な粉砕方法とは言え
ない。(5) Tube mills require more power than vertical roller mills, and since they are pulverizing highly viscous slurry, the required power is even higher, so it cannot be said to be an economical pulverization method.
本発明は、上記の問題を解消することができる高濃度（
通常石炭濃度６０〜７５％）の石炭スラリーの製造方法
を提供しようとするものである。The present invention provides high concentration (
The present invention aims to provide a method for producing a coal slurry having a coal concentration of usually 60 to 75%.
本発明の高濃度石炭水スラリの製造方法は次の手段を講
ずた。The method for producing a highly concentrated coal-water slurry of the present invention takes the following steps.
（１）分級器を備えた竪型ローラミルにより石炭を乾式
粉砕することにより得られる粉砕炭に水と添加剤を加え
て製品スラリより石炭濃度が１〜４％高い状態で混練機
において強剪断力混合を行った上、攪拌槽で濃度調整水
を加えて製品スラリ濃度に調節する。(1) Water and additives are added to the pulverized coal obtained by dry pulverizing coal using a vertical roller mill equipped with a classifier, and the coal concentration is 1 to 4% higher than the product slurry. After mixing, concentration adjustment water is added in a stirring tank to adjust the concentration of the product slurry.
（２）上記（υの高濃度石炭水スラリの製造方法におい
て、製品スラリの１部を超＠粉砕して超微粒スラリを混
練機人口に投入する。(2) In the method for producing high-concentration coal-water slurry (υ) described above, a part of the product slurry is ultra-pulverized and the ultra-fine slurry is introduced into a kneader.
上記（］）に記載の本発明は次の作用を奏することがで
きる。The present invention described in (]) above can exhibit the following effects.
（ｉ）本発明では、先ず分級器付き竪型ローラミルで石
炭が粉砕されるが、このときに竪型ローラミルの乾式粉
砕によって非常にシャープな粒度分布の粉砕炭が得られ
る。第２図は分級器付き竪型乾式ローラミルと湿式チュ
ーブミルでの粉砕炭の代表的粒径の比較を示したもので
あるが、同じ７５ミクロン以下看で比較すると、前者は
後者よりも粗粒（ここでは１５０ ミクロン以上量で表
示）が大巾に少いことが分る。これは分級器による粗粒
カット効果によるものである。(i) In the present invention, coal is first pulverized in a vertical roller mill equipped with a classifier, and at this time, pulverized coal with a very sharp particle size distribution is obtained by dry pulverization in the vertical roller mill. Figure 2 shows a comparison of typical particle sizes of pulverized coal produced by a vertical dry roller mill equipped with a classifier and a wet tube mill.When compared at the same particle size of 75 microns or less, the former has coarser particles than the latter. It can be seen that (here, the amount is expressed as an amount of 150 microns or more) is significantly smaller. This is due to the coarse particle cutting effect by the classifier.
また、竪型ローラミルによる粉砕炭中の水分は、非常に
安定しており、製品ＣＷＭの濃度制御は容易にかつ正確
に行うことが可能である。Furthermore, the water content in the pulverized coal produced by the vertical roller mill is very stable, and the concentration of the product CWM can be easily and accurately controlled.
（１１）乾式の竪型ローラミルは百ｔｏｎ／ｈ級の大容
ｆｆｉ機も実績があり、ＣＷＭｉｌ１度を７０％とする
と１４０ｔｏｎ−ＣＷＭ／ｈ級となり実際上、スケール
アンプの問題はまったくない。(11) Dry-type vertical roller mills have a proven track record as large-capacity ffi machines in the 100 ton/h class, and if CWMil 1 degree is set to 70%, it becomes a 140 ton-CWM/h class, and practically there is no problem with scale amplifiers.
（ｉｉ）乾燥粉砕炭によりＣＷＭを製造する場合の大き
な問題は、乾燥粉砕炭と水、添加剤とのなじみが悪いこ
とであった。これは湿式と異り、粉砕により活性化した
石炭表面が空気と触れるために不活性となることが原因
と考えられる。(ii) A major problem when producing CWM using dry pulverized coal is that the dry pulverized coal is not compatible with water and additives. This is thought to be due to the fact that, unlike the wet method, the surface of the coal activated by pulverization comes into contact with air and becomes inert.
本発明では、混練機で高濃度の製品ＣＷＭ濃度（石炭４
凌６０〜７５％程度）よりも１〜４％高い４度で強剪断
力混合しているために、粒子相互の摩砕が盛んになり、
粉砕炭表面が再活性化し、粉砕炭と水、添加剤とのなじ
みが非常に良くなる。この再活性化したかどうかの判断
は、混合により生じる超微粒（ここでは代表として１ミ
クロン以下量）生成量が目安となる。超微粒生成量が多
いということは、石炭表面に強い剪断力が作用した証拠
だからである。In the present invention, a high concentration of product CWM concentration (coal 4
Because the strong shearing force is mixed at 4 degrees, which is 1 to 4% higher than the average temperature (approximately 60 to 75%), mutual grinding of particles becomes active,
The surface of the pulverized coal is reactivated, and the compatibility between the pulverized coal, water, and additives becomes very good. The determination of whether reactivation has occurred is based on the amount of ultrafine particles (here, typically 1 micron or less) produced by mixing. This is because the large amount of ultrafine particles produced is evidence of strong shearing force acting on the coal surface.
第３図は高濃度の製品ＣＷＭを製造する際の混練機にお
ける混合濃度と超微粒生成量との実験例を示したもので
あるが、濃度が高くなると超微粒生成量が増加する。し
かし濃度が高くなり過ぎると共廻り現象（スラリか攪拌
翼について廻る現象）が生じて来るので、超微粒生成量
は逆に減少してしまうので、本発明では、混練に当って
の石炭濃度を製品ＣＷＭ１度よりも１〜４％高目に設定
した。FIG. 3 shows an experimental example of the mixing concentration and the amount of ultrafine particles produced in a kneading machine when producing a high concentration product CWM. As the concentration increases, the amount of ultrafine particles produced increases. However, if the concentration becomes too high, a synergistic phenomenon (a phenomenon in which the slurry rotates around the stirring blades) occurs, and the amount of ultrafine particles produced decreases. Therefore, in the present invention, the coal concentration during kneading is The temperature was set 1 to 4% higher than the product CWM 1 degree.
なお、第３図は、製品スラリの石炭の濃度６６％の場合
を示すが、石炭濃度６０〜７５％程度の高濃度の製品Ｃ
ＷＭスラリにおいては、石炭濃度が変っても第３図と同
様な関係が満足されることが、本発明者の実験によって
確認された。Although Fig. 3 shows the case where the coal concentration of the product slurry is 66%, product C with a high coal concentration of about 60 to 75%
In the WM slurry, it was confirmed through experiments by the present inventor that the same relationship as shown in FIG. 3 is satisfied even if the coal concentration changes.
（ｉｖ）以上のように、高濃度混合すると粉砕炭のなじ
みが良くなるが、この状態では粘度が高いために、製品
ＣＷＭの設定濃度になるように濃度調整水を添加して所
定の濃度１６０〜７５％とすることによって、低粘度で
非常に良好な高濃度の製品ＣＷＭが得られる。(iv) As mentioned above, mixing at a high concentration improves the adhesion of the pulverized coal, but since the viscosity is high in this state, concentration adjustment water is added to the product CWM to achieve a predetermined concentration of 160. ~75% gives a very good concentrated product CWM with low viscosity.
また、上記（２）に記載の本発明は、上記の作用に加え
て、最終製品スラリの１部を超微粉砕して得られる超微
粒スラリを混練機に投入しており、竪型ローラミルによ
る粉砕と上記超微＄５）砕に粉砕機能を分担させており
、ｌＪ）砕性の異る石炭に対しても、超微粒スラリの混
合割合を調整することによって、常に一定の望ましい粒
度分布をもつスラリか製造される。Furthermore, in addition to the above-mentioned effects, the present invention described in (2) above has an ultrafine slurry obtained by ultrafinely pulverizing a part of the final product slurry, which is charged into a kneading machine, and is processed by a vertical roller mill. The pulverization function is shared between the pulverization and the ultra-fine slurry described above, and even for coals with different pulverization properties, by adjusting the mixing ratio of the ultra-fine slurry, it is possible to always maintain a constant desired particle size distribution. A slurry is produced.
第１図により本発明の一実施例を説明する。 An embodiment of the present invention will be explained with reference to FIG.
原炭ホッパｌより竪型乾式ローラミル１９に投入された
石炭は、ミル１９内のローラ２１とテーブル２２で粉砕
されて、粉砕炭はミル１９下部より流入した熱風により
乾燥されながら、回転式分級器２０に送り込まれ、ここ
で粉砕炭中の粗粒が除去される。Coal fed into the vertical dry roller mill 19 from the raw coal hopper L is pulverized by the rollers 21 and table 22 inside the mill 19, and the pulverized coal is dried by hot air flowing in from the lower part of the mill 19, and then passed through the rotary classifier. 20, where coarse particles in the pulverized coal are removed.
このようにして、竪型乾式ローラミルによって粒度分布
のシャープな粉砕炭が得られる。ミル用熱風は、送風機
２３によりライン２５から燃料油タンク３０から燃料油
ライン２８を経て燃料油が供給されるラインコンパスタ
−３６に送られ、高温熱風となってライン２６に至る０
通常竪型ミルで必要な熱風温度は２００〜４００ ’Ｃ
であり、高温熱風はライン２４より送り込まれる冷風と
混合されて適正温度に調整されてライン２７よりミルに
送り込まれる。In this way, pulverized coal with a sharp particle size distribution can be obtained by the vertical dry roller mill. The hot air for the mill is sent by the blower 23 from the line 25 to the line comparator 36 to which fuel oil is supplied from the fuel oil tank 30 via the fuel oil line 28, where it becomes high temperature hot air and reaches the line 26.
Normally, the hot air temperature required for vertical mills is 200 to 400'C.
The high-temperature hot air is mixed with cold air sent from line 24, adjusted to an appropriate temperature, and sent to the mill via line 27.
粗粒が除去された粉砕炭はライン３１．３３を通ってサ
イクロン３２とバグフィルタ−３４に送られ、ここで空
気と分離され、空気はライン３５より糸外に出される。The pulverized coal from which coarse particles have been removed is sent through lines 31 and 33 to a cyclone 32 and a bag filter 34, where it is separated from air, and the air is taken out through line 35.
分離回収された粉砕炭はライン３７．３８よりコンベア
３９により混練機４０に送られる。混線機にはうイン５
と４１により添加剤（乾炭量に対して０．５〜０．７％
）と水が供給され、また必要に応じてライン４２より後
述する超微粒ミル５３からの超微粒ＣＷＭも供給される
。混練８４０内の石炭濃度は、最終製品スラリの濃度よ
り１〜４％高くなるように水の供給量が制御される。粉
砕炭、水及び添加剤と超微粒は混練機４０で十分に強剪
断を与えられた状態で混合され、この際粉砕炭表面が摩
砕されて活性化されたなじみの良いＣＷＭとなり、これ
がポンプ４４によりライン４３．４５を通って撹拌槽４
６に送られる。ここで製品ＣＷＭｐ度６０〜７５％にな
るようにライン４１”より水が供給され、十分な攪拌混
合が行われて、低粘度の良質な高４度の製品ＣＷＭとな
り、ポンプ４８によりライン４７．４９を通り、製品Ｃ
ＷＭ貯蔵タンク１８に送られる。The separated and recovered pulverized coal is sent to a kneader 40 by a conveyor 39 through lines 37 and 38. Crawling into the crosstalk machine 5
and 41 as additives (0.5 to 0.7% based on the amount of dry coal)
) and water are supplied, and ultrafine CWM from an ultrafine mill 53, which will be described later, is also supplied from a line 42 as needed. The amount of water supplied is controlled such that the coal concentration in the kneading 840 is 1-4% higher than the concentration of the final product slurry. The pulverized coal, water, additives, and ultrafine particles are mixed in a kneader 40 under sufficiently strong shear, and at this time, the surface of the pulverized coal is ground and activated to form a familiar CWM, which is then transferred to the pump. 44 through line 43.45 to stirring tank 4.
Sent to 6. Here, water is supplied from line 41'' so that the product CWMp degree is 60 to 75%, sufficient stirring and mixing is performed, and a high-quality product CWM with low viscosity and high 4 degrees is obtained. 49, product C
It is sent to the WM storage tank 18.
また、超微粒が必要な場合には、製品ＣＷＭの１部がポ
ンプ５１によりライン５０．５２を通って超微粒ミル５
３に送られ、超微粒が製造され、これが上記のようにラ
イン４２をへて混練機４０に送られ、スラリ中の石炭の
粒度分布が調整される。Also, if ultrafine grains are required, a portion of the product CWM is passed through line 50, 52 by pump 51 to ultrafine mill 5.
3 to produce ultrafine particles, which are sent to the kneader 40 via line 42 as described above to adjust the particle size distribution of the coal in the slurry.
本実施例と従来の湿式チェーブミルを用いた従！ 来方法による実験結果を第ヤ表に示す。A comparison between this example and a conventional wet-type chave mill! The experimental results using the conventional method are shown in Table 1.
同表から明らかなように、炭種が変っても、本実施例に
おいては、７５ミクロン以下の量が安定し、燃焼性や貯
蔵安定性に悪影響を与える粗粒の量が著しく低減した望
ましい粒度分布をもち、かつ低粘度で良質の高濃度ＣＷ
Ｍが得られることが判明１″・
以下余白〔発明の効果〕
本発明は次の効果を奏することができる。As is clear from the table, even if the type of coal changes, in this example, the amount of coarse particles is stable at 75 microns or less, which is a desirable particle size that significantly reduces the amount of coarse particles that adversely affect combustibility and storage stability. High concentration CW with good distribution and low viscosity
It turns out that M can be obtained 1″・
Margin below [Effects of the Invention] The present invention can have the following effects.
（＋） 竪型ローラミルを使用することにより、従来
の湿式チューブミルでは限界のあったスケールアンプの
問題を解消することができ、また竪型ローラミルの粉砕
炭中水分は非常に安定しているので、製品ＣＷＭの濃度
コントロールが容易で正確である。(+) By using a vertical roller mill, it is possible to solve the problem of scale amplifier, which was a limitation with conventional wet tube mills, and the water content in the pulverized coal of a vertical roller mill is very stable. , concentration control of product CWM is easy and accurate.
（２）分級器を備えた竪型ローラミルを使用しているの
で、燃焼性や貯蔵安定性に悪影響を与える粗粒を、従来
より大巾に低減することができる。(2) Since a vertical roller mill equipped with a classifier is used, coarse particles that adversely affect combustibility and storage stability can be reduced to a greater extent than in the past.
（３） 混練機で製品スラリより石炭濃度が１〜４％
高い状態で強勢断力混合を行なうことによって、粉砕炭
表面を活性化して水と添加剤とのなじみを良好にするこ
とができ、これに水を加えて所定の高濃度のスラリとす
ることによって、低粘度で良質の高濃度ＣＷＭを製造す
ることができる。(3) The coal concentration is 1 to 4% from the product slurry in the kneading machine.
By mixing under high stress and shearing force, it is possible to activate the pulverized coal surface and improve the compatibility between water and additives, and by adding water to this to form a slurry with a predetermined high concentration. , it is possible to produce high-concentration CWM with low viscosity and good quality.
（４）また、製品ＣＷＭの一部を超微粉砕して得られる
超微粒スラリを混練機入口に投入し、竪型ローラミルと
超微粒ミルに粉砕機能を分担しているので、粉砕性の異
る石炭に対しても、常に一定の理想的粒度分布を得るこ
とができる。(4) In addition, the ultrafine slurry obtained by ultrafinely pulverizing a part of the product CWM is fed into the inlet of the kneading machine, and the grinding function is shared between the vertical roller mill and the ultrafine mill, so there is no difference in grindability. It is possible to always obtain a constant ideal particle size distribution even for coal that is
第１図は本発明の一実施例に係るＣＷＭ製造方法のシス
テム図、第２図は分級器付き竪型ローラミルと湿式チュ
ーブミルを用いた場合における粗粒量の違いを示す実験
結果のグラフ、第３図は本発明の上記実施例において、
混練濃度と１ミクロン以下量の生成量との関係を示す実
験結果のグラフ、第４図は従来の湿式チューブミルを用
いたＣＷＭ製造方法を示すシステム図である。
ｌ−原炭ホツバ−５−添加剤供給ライン、１８−製品Ｃ
Ｗ Ｍ ｆｆ？蔵タンク、１９−竪型乾式ミル、 ２
〇−回転式分級器、２１−・ローラ、 ２２−
テーブル、２３−送風機、 ２４−冷風ラ
イン、２５ 、２６ 、２７−一熱風ライン、２８−燃
料油ライン、２９・・燃料輸送ライン、 ３〇−燃料油
タンク、３１−微粉炭輸送ライン、３２−サイクロン、
３３．３５ 排気ライン、 ３４− バグフィルタ−
３６−ラインコンパスタ−
３７，３８−一微粉炭排出ライン、 ３９− コンベア
、４０−混練機、 ４１．４１’、４１′−・−水
供給ライン、４２−超微粒ＣＷＭ輸送ライン、
４４．４８．５１−・−ポンプ、
４３４５．４７，４９，５０．５２・−ＣＷＭ輸送ライ
ン、４６−攪拌槽、 ５３−超微粒ミル。
第２図
代理人 弁理士 坂 間 暁
外２名
７５ミクロン以下響（％）FIG. 1 is a system diagram of a CWM manufacturing method according to an embodiment of the present invention, and FIG. 2 is a graph of experimental results showing the difference in coarse particle amount when using a vertical roller mill with a classifier and a wet tube mill. FIG. 3 shows that in the above embodiment of the present invention,
A graph of the experimental results showing the relationship between the kneading concentration and the amount of particles of 1 micron or less produced, and FIG. 4 is a system diagram showing a CWM manufacturing method using a conventional wet tube mill. l-Raw coal hotsuber-5-Additive supply line, 18-Product C
W Mff? Storage tank, 19-vertical dry mill, 2
〇-Rotary classifier, 21-・Roller, 22-
Table, 23-Blower, 24-Cold air line, 25, 26, 27-Hot air line, 28-Fuel oil line, 29...Fuel transport line, 30-Fuel oil tank, 31-Pulverized coal transport line, 32- Cyclone,
33.35 Exhaust line, 34- Bag filter
36-Line compaster-37, 38-Pulverized coal discharge line, 39-Conveyor, 40-Kneading machine, 41.41', 41'--Water supply line, 42-Ultrafine CWM transport line, 44.48 .51--pump, 4345.47,49,50.52--CWM transport line, 46-stirring tank, 53-ultrafine mill. Figure 2 Agent: Patent attorney Akira Sakama, 2 people, 75 microns or less (%)
Claims (2)
粉砕することにより得られる粉砕炭に水と添加剤を加え
て製品スラリより石炭濃度が１〜４％高い状態で混練機
において強剪断力混合を行った上、攪拌槽で濃度調整水
を加えて製品スラリ濃度に調整することを特徴とする高
濃度石炭水スラリの製造方法。(1) Water and additives are added to the pulverized coal obtained by dry pulverizing coal using a vertical roller mill equipped with a classifier, and the coal concentration is 1 to 4% higher than the product slurry. A method for producing high-concentration coal-water slurry, which comprises mixing and then adding concentration-adjusting water in a stirring tank to adjust the concentration to a product slurry.
スラリを混練機入口に投入することを特徴とする請求項
（１）に記載の高濃度石炭水スラリの製造方法。(2) The method for producing a highly concentrated coal-water slurry according to claim (1), characterized in that the ultrafine slurry obtained by ultrafinely pulverizing a portion of the product slurry is charged into the inlet of a kneader.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63311936A JP2511129B2 (en) | 1988-12-12 | 1988-12-12 | Method for producing high concentration coal water slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63311936A JP2511129B2 (en) | 1988-12-12 | 1988-12-12 | Method for producing high concentration coal water slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02158688A true JPH02158688A (en) | 1990-06-19 |
| JP2511129B2 JP2511129B2 (en) | 1996-06-26 |
Family
ID=18023217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63311936A Expired - Fee Related JP2511129B2 (en) | 1988-12-12 | 1988-12-12 | Method for producing high concentration coal water slurry |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2511129B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107312580B (en) * | 2017-07-10 | 2019-04-23 | 湖北宜化化工股份有限公司 | A kind of coal slurry concentrate and technique for treating industrial wastewater and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59147088A (en) * | 1983-02-10 | 1984-08-23 | Mitsubishi Heavy Ind Ltd | Preparation of coal-water slurry |
| JPS61283691A (en) * | 1985-06-10 | 1986-12-13 | Kawasaki Heavy Ind Ltd | Production of high-concentration coal-water slurry in short time |
-
1988
- 1988-12-12 JP JP63311936A patent/JP2511129B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59147088A (en) * | 1983-02-10 | 1984-08-23 | Mitsubishi Heavy Ind Ltd | Preparation of coal-water slurry |
| JPS61283691A (en) * | 1985-06-10 | 1986-12-13 | Kawasaki Heavy Ind Ltd | Production of high-concentration coal-water slurry in short time |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2511129B2 (en) | 1996-06-26 |
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