JPS6213494A - Preparation of aqueous slurry of coal in high concentration - Google Patents

Abstract

PURPOSE:To crush dehydrated cake totally into small lumps, by making dehydrated cake fall on an inclined plate having a wavy surface or surface projections before it is fed into a slurry conditioning tank in the preparation of a conc. aqueous slurry of coal by the low-concn. wet process. CONSTITUTION:Coal is crushed in water in a wet mill to produce a low-concn. aqueous slurry of coal. The low-concn. slurry is dehydrated as it is or after classification to remove coarse particles. Resultant dehydrated cake is made to fall on one or several inclined plates having a wavy surface or surface projections to perform crushing. Resultant dehydrated cake in small lumps is led into a slurry conditioning tank for mixing with conditioning water and additives to produce a conditioned aqueous slurry of coal in a high concn. For example, dehydrated cake 9 is made to fall on 1st plate 10b, 2nd plate 10c and then 3rd plate 10d kept horizontal or inclined at an angle theta for crushing by collision into dehydrated cake 9'''' in small lumps.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、低濃度で石炭を粉砕する方式の高濃度石炭水
スラリ゛製造方法において、スラリ調整槽でのスラリの
混合、攪拌を良好にする為、及び脱水ケーキ処理ｆｌｋ
を増大させる為の、脱水機出口の塊状脱水ケーキを小粒
に塊砕する方法に関するものである。Detailed Description of the Invention (Industrial Field of Application) The present invention provides a method for producing a highly concentrated coal-water slurry in which coal is pulverized at a low concentration, in which mixing and stirring of the slurry in a slurry adjustment tank is improved. and dehydrated cake processing flk
The present invention relates to a method of crushing a lumpy dehydrated cake at the outlet of a dehydrator into small particles in order to increase the amount of water.

（従来の技術） 中　高濃度石炭水スラリ製造システム 高濃度石炭水スラリとは、微粉砕した石炭６０へ９０重
量％と水１０〜４０重量％とに若干の添加剤を加えた混
合物で、脱水を行なうことなく、そのままボイラ等で燃
焼可能な流体燃料のことであり、固体燃料である石炭を
流体化することにより利用範囲を飛闘的に拡大するもの
である。なお、以下石炭水スラリを単にスラリと略記す
る。(Prior art) Medium-high concentration coal-water slurry manufacturing system High-concentration coal-water slurry is a mixture of finely pulverized coal 60, 90% by weight, 10 to 40% water, and some additives, and is dehydrated. It is a fluid fuel that can be combusted as is in a boiler or the like without any further processing, and by converting coal, which is a solid fuel, into a fluid, its range of use can be dramatically expanded. In addition, the coal water slurry will be simply abbreviated as slurry below.

従来、高濃度スラリの製造法には、大別して乾式法、高
濃度湿式法及び低濃度湿式法の５種類があった。Conventionally, there have been five types of methods for producing high concentration slurry: a dry method, a high concentration wet method, and a low concentration wet method.

乾式法はミルを使用し空気中で石炭を微粉砕した後、こ
れを水及び添加剤と一緒に混合・攪拌（以下、混合攪拌
と記す］して高濃度スラリとするものである。In the dry method, coal is pulverized in air using a mill, and then mixed and stirred (hereinafter referred to as mixing and stirring) with water and additives to form a highly concentrated slurry.

また、高濃度湿式法はチューブミルに石炭、水及び添加
剤を同時に投入し、微粉砕と混合攪拌を同時に行なうも
のである。Furthermore, in the high-concentration wet method, coal, water, and additives are simultaneously charged into a tube mill, and pulverization and mixing and stirring are performed at the same time.

さらに、低ｌ１ｌ１度湿式法はチューブミルに石炭と水
とを投入して低濃度で微粉砕し、いったん石炭２０〜６
０重’ｉ％と水４０〜８０重ｉｋチの低濃度スラリとし
たのち、これを脱水機にて脱水して脱水ケーキとし、こ
れを混合攪拌機内において改めて少量の調整水と添加剤
と一緒に混合攪拌して高濃度スラリとするものである。Furthermore, in the low l1l1 degree wet method, coal and water are put into a tube mill and pulverized at a low concentration, and once the coal 20 to 6
After making a low-concentration slurry of 0% by weight and 40 to 80% by weight of water, this is dehydrated in a dehydrator to form a dehydrated cake, which is then mixed with a small amount of adjusted water and additives again in a mixer. The mixture is mixed and stirred to form a highly concentrated slurry.

第４図に示すものは、従来の低Ｓ度湿式高濃度スラリの
製造方法に関するフローシートの例である。What is shown in FIG. 4 is an example of a flow sheet related to a conventional method for manufacturing a low S temperature wet high concentration slurry.

第４図において、１は石炭の供給用貯留槽、２は石炭の
供給ライン、３はミル供給水用のタンク、４はミル供給
水の供給ライン、５は湿式ミル、６は湿式ミル５で得ら
れた低濃度スラリの輸送ライン、７は脱水機、８Ｆｉ脱
水機７で脱水して得られた脱水水の排出ライン、９は脱
水機７で脱水して得られたスラリ（以下、脱水ケーキ］
の輸送ライン、０１０は脱水ケーキを小粒に腕枠する腕
枠機、１１は小塊状脱水ケーキの輸送ライン、１２は混
合攪拌機又はスラリ調整槽（以下、スラリ調整槽）、１
５はスラリ調整槽１２への調整水の供給ライン１４を介
して調整水を供給する調整水用のタンク、１５はスラリ
調整槽１２に添加剤を供給ライン１６全介して供給する
添加剤用のタンク、１７は製品である高濃度スラリの輸
送ライン、１８は調整高濃度スラリの輸送ポンプ、１９
は製品である高濃度スラリの貯蔵タンク又はボイラ等の
燃焼手段（以下、製品スラリ用タンクと記す）でおる。In Fig. 4, 1 is a storage tank for supplying coal, 2 is a coal supply line, 3 is a tank for mill supply water, 4 is a supply line for mill supply water, 5 is a wet mill, and 6 is a wet mill 5. A transport line for the obtained low concentration slurry, 7 is a dehydrator, a discharge line for dehydrated water obtained by dehydrating in the 8Fi dehydrator 7, 9 is a slurry obtained by dehydrating in the dehydrator 7 (hereinafter referred to as dehydrated cake) ]
010 is an arm frame machine for forming dehydrated cakes into small particles, 11 is a transportation line for small dehydrated cakes, 12 is a mixing agitator or slurry adjustment tank (hereinafter referred to as slurry adjustment tank), 1
Reference numeral 5 denotes a tank for adjusting water that supplies adjusted water to the slurry adjusting tank 12 via the adjusting water supply line 14, and 15 denotes an additive tank that supplies additives to the slurry adjusting tank 12 through the supply line 16. Tank, 17 is a transportation line for high concentration slurry as a product, 18 is a transportation pump for adjusted high concentration slurry, 19
is a combustion means such as a storage tank or a boiler for the highly concentrated slurry that is the product (hereinafter referred to as a tank for product slurry).

この工うなフローシートにおいて、貯留槽１及びタンク
３からライン２及び４を介して石炭及びミル供給水を湿
式ミル５に供給し、低１ＩＩｉ度で粗粉砕処理して低濃
度スラリを作る。In this simple flow sheet, coal and mill feed water are supplied from the storage tank 1 and tank 3 to the wet mill 5 via lines 2 and 4, and are coarsely pulverized at a low temperature of 1IIi degrees to form a low-concentration slurry.

この低濃度スラＩＪ’ｔライン６に工って脱水機７へ供
給する。脱水機７では低濃度スラリ脱水し、脱水水はラ
イン８から排水し、脱水ケーキはライン９を介して腕枠
機０１０で小粒に腕枠した後、ライン１１からスラリ調
整槽１２に供給する。このスラリ調整槽１２では供給さ
れてきた脱水ケーキにタンク１３及び１５からライン１
４及び１６を介して供給される調整水及び添加剤を一緒
に混合攪拌して粘性の低い高濃度スラリに調整し、製品
として高濃度スラリボンダ１８ｆ、介してライン１７か
ら製品スラリ用タンク１９に供給する。This low concentration slurry is connected to the IJ't line 6 and supplied to the dehydrator 7. A low concentration slurry is dehydrated in a dehydrator 7, the dehydrated water is drained from a line 8, and the dehydrated cake is passed through a line 9 into small pieces by an arm frame machine 010, and then supplied from a line 11 to a slurry adjustment tank 12. In this slurry adjustment tank 12, the supplied dehydrated cake is connected to the line 1 from tanks 13 and 15.
Adjustment water and additives supplied through 4 and 16 are mixed and stirred together to adjust to a high concentration slurry with low viscosity, and then supplied as a product to a product slurry tank 19 from a line 17 via a high concentration slurry ribboner 18f. do.

（１１）脱水ケーキ腕枠方法 第５図は、第４図の脱水ケーキ塊砕機０１０の構造例を
示したものである。第５図において、０１０ａ　は脱水
ケーキの入口、０１０ｂは小塊枠状脱水ケーキの出口、
０１０ｃは適宜な間隔を有して並行に架設された上端側
に細くなったくさび形のスリット相棒群、０１０（１は
スリット相棒群０１０ｃの長手方向とｔｌぼ直角に配設
された回転軸、０１０θは回転軸０１０ｄ　ｔ−回転さ
せるモータ、０１０ｆは回転軸０１０ｄの円周方向にみ
て位相をずらして設けられており、かつスリット相棒０
１０Ｃで作られる各々のスリットに各々が咬合する工う
に嵌装された腕枠月俸群である。(11) Dehydrated cake arm frame method FIG. 5 shows an example of the structure of the dehydrated cake crusher 010 shown in FIG. 4. In FIG. 5, 010a is the inlet of the dehydrated cake, 010b is the outlet of the small block frame-shaped dehydrated cake,
010c is a wedge-shaped slit companion group installed in parallel with appropriate intervals and narrows at the upper end; 010 (1 is a rotating shaft disposed approximately perpendicular to the longitudinal direction of the slit companion group 010c; 010θ is a motor that rotates the rotating shaft 010d, 010f is a motor that is provided with a phase shift when viewed in the circumferential direction of the rotating shaft 010d, and a slit partner 0
This is a group of arm frames each fitted with a tool that engages each slit made of 10C.

この工うに、脱水ケーキは、一定間隔の静止スリット（
すなわち、スリット相棒群０１０Ｃで形成されるスリッ
ト）及び回転する回転スリット（すなわち、腕枠月俸群
０１０ｆで形成されるスリット）間を通ることに工り、
小塊枠状に腕枠される。In this process, the dehydrated cake is cut through stationary slits at regular intervals (
That is, it is designed to pass between the slit formed by the slit partner group 010C) and the rotating rotating slit (that is, the slit formed by the arm frame monthly salary group 010f),
The arm is framed in the shape of a small block frame.

（発明が解決しようとする問題点） このような低ｓｉ度湿式法高濃度スラリの製造方法にお
いては、固体である脱水ケーキ及び液体である調整水、
添加剤を均一混合調整するスラリ調整槽１２（第４図参
ｆ！＠）での混合、攪拌の良悪が重要な役割をもつ。さ
らに上流に逆のぼれば、固体でるる脱水ケーキをスラリ
調整槽１２に供給する前にできるだけ、細かく腕枠して
おくことがスラリ調整槽１２での混合、攪拌を良好にし
、質の良い高＃［スラリを作ること〃；できると言える
。(Problems to be Solved by the Invention) In such a method for producing a high concentration slurry using a low SI wet method, a solid dehydrated cake, a liquid conditioned water,
The quality of mixing and stirring in the slurry adjustment tank 12 (see Fig. 4, f! @) that uniformly mixes and adjusts the additives plays an important role. Going further upstream, it is important to make the solid dehydrated cake as finely as possible before feeding it to the slurry adjustment tank 12 to ensure good mixing and agitation in the slurry adjustment tank 12, and to produce high-quality high-quality [Making slurry]; It can be said that it can be done.

第５図の脱水ケーキ塊砕機０１０は上記の理由により配
置されるものであるが、第５図に示す工うな静止スリッ
ト及び回転スリットによる腕枠では未だ完全とは云い難
い。その理由は脱水ケーキが偏平形状である為に、回転
スリットにも当たらず、静止スリットのすき間から大塊
状のままスラリ調整槽１２に落下する場合がある為であ
る。Although the dewatered cake crusher 010 shown in FIG. 5 is arranged for the above-mentioned reasons, the arm frame with stationary slits and rotating slits as shown in FIG. 5 is still far from perfect. The reason for this is that since the dehydrated cake has a flat shape, it may not even hit the rotating slit and may fall into the slurry adjustment tank 12 in the form of a large lump through the gap between the stationary slits.

本発明は、全量の脱水ケーキを確実に小塊砕状に腕枠し
得るスラリの製造法を提供するものである。The present invention provides a method for producing slurry that can reliably crush the entire amount of dehydrated cake into small pieces.

（問題点を解決するための手段） 従来の脱水ケーキ塊砕機の問題点は偏平形状の脱水ケー
キがスリットに当たらず累通りする可能性があるところ
にある。(Means for solving the problem) The problem with the conventional dehydrated cake crusher is that the flat dehydrated cake may pass through the slit repeatedly without hitting the slit.

本発明では、斯る問題点を、全量の脱水ケーキを板上に
落下させ、必ず板との衝突を行なわせ、また落下高さに
ニジ衝突力全コントロールし、更に板の段数を増して粒
度構成を細かくすることにニジ解決するものである。In the present invention, such problems are solved by dropping the entire amount of dehydrated cake onto a plate, making sure that it collides with the plate, fully controlling the collision force at the falling height, and increasing the number of plates to improve the particle size. The solution is to make the structure more detailed.

すなわち本発明は、石炭を水中で湿式ミルによって粗粉
砕して低濃度石炭水スラリを作り、次いで該低濃度石炭
水スラリを脱水、又は粗粒子分級後脱水し、得られる脱
水ケーキをスラリ調整槽に導き、同スラリ調整槽で供給
される調整水、添加剤とともに混合、攪拌しながら調整
して調整高濃度石炭水スラリを作る高濃度石炭水スラリ
製造方法において、前記スラリ調整槽に導く前記脱水ケ
ーキを、脱水機又は脱水ケーキ搬送コンベヤから一般又
は数段の傾斜した平板又は表面が波状又は突起状の板の
上に落下させて腕枠し、しかる後前記スラリ調整槽に供
給することを特徴とする高濃度石炭水スラリの製造方法
に関する。That is, in the present invention, coal is coarsely pulverized in water using a wet mill to create a low-concentration coal-water slurry, then the low-concentration coal-water slurry is dehydrated, or dehydrated after coarse particle classification, and the resulting dehydrated cake is sent to a slurry conditioning tank. In the method for producing a highly concentrated coal water slurry, the slurry is mixed with adjusted water and additives supplied in the slurry adjustment tank, and adjusted while stirring to produce an adjusted high concentration coal water slurry. The cake is dropped from a dewatering machine or a dehydrated cake conveyor onto a general or multi-tiered inclined flat plate or a plate with a corrugated or protruding surface, and is then arranged in an arm frame and then supplied to the slurry adjustment tank. The present invention relates to a method for producing a highly concentrated coal-water slurry.

（作用） 脱水ケーキは数μｍから数十μｍの石炭粒子が水によっ
て凝集したものであり、ある程度の他物体との衝突力で
腕枠可能なものである。ただしある程度の衝突力で腕枠
可能とは言え、スラリ調整槽の攪拌翼のみで腕枠を行わ
せると、（鴬拌翼駆動動力も大動力が必要となるし、混
合、攪拌も小塊砕状の場合と同一攪拌時間で北壁すると
不良となる。従って、本発明において、スラリ調整槽の
前段工程で脱水ケーキを一段又は数段に設けた板に衝突
させて腕枠するのである。(Function) The dehydrated cake is made up of coal particles of several micrometers to several tens of micrometers aggregated by water, and can be formed into an arm by a certain amount of collision force with other objects. However, although arm-shaping is possible with a certain amount of collision force, if arm-shaping is performed only with the stirring blades of the slurry adjustment tank, a large amount of power is required to drive the stirring blades, and mixing and stirring are also difficult to break into small pieces. If it hits the north wall during the same stirring time as in the case of a slurry, it will be defective.Therefore, in the present invention, in the first step of the slurry adjustment tank, the dehydrated cake is collided with a plate provided in one or several stages to form an arm frame.

また、本発明において、脱水ケーキの衝突対象物である
板を一定振幅、周波数で振動させることもでき、これに
より、凝集した脱水ケーキの分散は強化され、工り小塊
砕状とすることができる。Furthermore, in the present invention, it is possible to vibrate the plate that is the object of collision of the dehydrated cake at a constant amplitude and frequency, thereby strengthening the dispersion of the aggregated dehydrated cake and making it possible to break it into small pieces. can.

（実施例］ 第１図は、本発明のうち、水平から傾けた３段の平板の
上に脱水ケーキを落下させて小塊砕状に腕枠する方法の
例を示したものである。この方法の腕枠装置は、第４図
の符号１０で示す位置で用いられる。(Example) Fig. 1 shows an example of a method according to the present invention in which a dehydrated cake is dropped onto three flat plates tilted from the horizontal and crushed into small pieces. The arm frame device of the method is used in the position indicated at 10 in FIG.

第１図において、９は脱水ケーキが供給される脱水ケー
キの輸送ラインで、偏平形状の脱水　・ケーキ９゛が投
下される。９＃は、水平から角度θ傾き、矢印１０ａで
示すように一足振幅、周波数で振動する第１段板１０ｔ
）で衝突腕枠され、ｉ＠２段板１０ａに投下する脱水ケ
ーキである。９　は、第２段板１０ｅからｆｓ５段板１
０（ｌに投下する脱水ケーキである。なお、第２段板１
０Ｃ１第３段板１０（Ｌとも第１段板１０１）と同様、
一定振幅、周波数で振動する例を示している。９　はこ
の工すな３段の板１０ｂ　、　１０ｃ　、　１０ｄで腕
枠された小塊枠状脱水ケーキであり、１１は調整水、添
加剤と混合、攪拌するスラリ調整槽１２への小塊状脱水
ケーキの輸送ラインを示している。In Fig. 1, reference numeral 9 denotes a dewatered cake transportation line through which dehydrated cake is supplied, and a flat dehydrated cake 9' is dropped therein. 9# is a first stage plate 10t that vibrates at an angle θ inclination from the horizontal and a single foot amplitude and frequency as shown by an arrow 10a.
), and the dehydrated cake is dropped onto the i@2-tier plate 10a. 9 is the fs5 stage board 1 from the second stage board 10e.
This is the dehydrated cake that is dropped onto the 0 (l).
Similar to the 0C1 third stage plate 10 (both L and first stage board 101),
An example of vibration with constant amplitude and frequency is shown. Reference numeral 9 indicates a dewatered cake in the shape of a small block framed by the three-tiered plates 10b, 10c, and 10d, and reference numeral 11 indicates the dewatered cake in the form of a small block into the slurry adjustment tank 12, which mixes and stirs adjustment water and additives. It shows the cake transportation line.

傾斜板の傾斜角度θが小さいと脱水ケーキは堆積し、大
きいと脱水ケーキは壊砕されずスラリ調整槽１２に落下
するので、脱水ケーキの性状に応じてこの角度θを実操
業では一足の範囲に選定することが重要である。If the inclination angle θ of the inclined plate is small, the dehydrated cake will accumulate; if it is large, the dehydrated cake will fall into the slurry adjustment tank 12 without being crushed. Therefore, depending on the properties of the dehydrated cake, this angle θ should be set within a range of one foot in actual operation. It is important to select

第２図は本発明に係る実施例のフローシイートである。FIG. 2 is a flow sheet of an embodiment according to the present invention.

第２図における符号１乃至１９０うち第４図における符
号１乃至１９と同じ符号は均等物なので説明を省略する
。Among the reference numerals 1 to 190 in FIG. 2, the same reference numerals as the reference numerals 1 to 19 in FIG. 4 are equivalent, so their explanation will be omitted.

そして、第２図において、２０はライン６を介して供給
されてくる低濃度スラリを希釈水で分級しやすいＳ度ま
で薄める希釈用タンク、２１は希釈水用のタンク、２２
は希釈水タンク２０の希釈水全供給する希釈水の供給ラ
イン、２３は希釈用タンク２０で希釈されて得られる石
炭１５〜４０重量％、水６０〜８５重量％の低濃度スラ
リ（以下、希釈低濃度スラリと記す）を輸送するライン
である。２４はライン２３から供給されてきた低濃度ス
ラリ中の粗粒會分離し、粗粒ｔ−含む低濃度スラリ（以
下、粗粒含有低濃度スラリと記す］と粗粒が除去された
低濃度スラリ（以下、粗粒カット低濃度スラリと記すＪ
とに分級する分級器、２５は分級器２４で得られる粗粒
含有低濃度スラリを粗粉砕ミル５ａに返送する粗粒含有
低濃度スラリの返送循環ライン、２６は分級器２４で分
級された粗粒カット低濃度スラリの輸送ライン、２７は
浮上分離などで粗粒カット低濃度スラリ中の灰分全敗り
除く脱灰装置、２８は脱灰装置２７で得られる灰の排出
ライン、２９は脱灰装置２７で得られる低濃度脱灰スラ
リの輸送ライン、３０はラインミキサなどの熟成機、５
１は熟成機３０で攪拌されて熟成された均一性のおる良
質の高１１！度脱灰スラリ（以下、熟成高濃度脱灰スラ
リと記す１の輸送ライン、３２は熟成高濃度脱灰スラリ
の分配チ、３５は熟成高濃度脱灰スラリの１部（以下、
返送熟成高濃度脱灰スラリと記す）の返送循環ライン、
３４Ｆｉ返送熟成高濃度脱灰スラリの輸送ポンプ、３５
は超微粉砕ミル、３６は超微粉砕ミル５５で得られた超
微小粒含有熟成脱灰スラリの返送循環ライン、３７は製
品として又は次工程へ供給される高品質の高濃度脱灰ス
ラリ（以下、製品高ａ度スラリと記す）の輸送ラインで
ある。In FIG. 2, 20 is a dilution tank that dilutes the low-concentration slurry supplied via line 6 to an S degree that is easy to classify with dilution water, 21 is a tank for dilution water, and 22
23 is a dilution water supply line that supplies all the dilution water in the dilution water tank 20, and 23 is a low concentration slurry (hereinafter referred to as diluted This line transports low-concentration slurry). 24 separates the coarse particles in the low concentration slurry supplied from the line 23, and separates the low concentration slurry containing coarse particles (hereinafter referred to as low concentration slurry containing coarse particles) and the low concentration slurry from which the coarse particles have been removed. (hereinafter referred to as coarse grain cut low concentration slurry)
25 is a return circulation line for the coarse grain-containing low concentration slurry obtained by the classifier 24 to be returned to the coarse grinding mill 5a; 26 is a return circulation line for the coarse grain-containing low concentration slurry obtained by the classifier 24; A transport line for the grain cut low concentration slurry, 27 is a deashing device for removing all the ash in the coarse grain cut low concentration slurry by flotation separation, etc. 28 is a discharge line for the ash obtained in the deashing device 27, 29 is a deashing device 27 is a transportation line for the low-concentration demineralized slurry, 30 is a ripening machine such as a line mixer, 5
1 is a high quality high 11 with uniformity that has been stirred and aged in the aging machine 30! transportation line 1, 32 is a distribution line for aged highly concentrated demineralized slurry (hereinafter referred to as aged highly concentrated demineralized slurry), 35 is a part of aged highly concentrated demineralized slurry (hereinafter referred to as
A return circulation line for the return aged high-concentration demineralized slurry);
34Fi return matured high concentration demineralized slurry transport pump, 35
36 is a return circulation line for the aged demineralized slurry containing ultrafine particles obtained by the ultra-fine grinding mill 55, and 37 is a high-quality, highly concentrated demineralized slurry that is supplied as a product or to the next process ( This is a transportation line for the product (hereinafter referred to as high grade slurry).

また、５ａは粗粉砕ミル、？ａは脱水機７で得られる粗
粒カット脱水脱灰ケーキの輸送ライン、１１ａは第１図
に示す腕枠装置１０にて得られる均等に小さく塊砕され
た小塊状粗粒カット脱水脱灰ケーキの輸送ライン、１７
ａはスラリ調整槽１２で得られる調整高濃度脱灰スラリ
の輸送ラインである。Also, 5a is a coarse grinding mill, ? 11a is a transportation line for the coarse cut dehydrated demineralized cake obtained by the dehydrator 7, and 11a is the coarse cut dehydrated demineralized cake evenly crushed into small pieces obtained by the arm frame device 10 shown in FIG. transportation line, 17
A is a transportation line for the adjusted high concentration demineralized slurry obtained in the slurry adjustment tank 12.

第２図尺示すこのような実施例において、石炭貯留槽１
の石炭及び供給水用タンク３の粗粉砕ミル供給水をライ
ン２及び４を介して粗粉砕ミル５ａに供給し、低濃度で
粗粉砕処理し石炭２０Ｓ６０重量％の低濃度スラリを作
る。この低濃度スラリをライン６によって希釈用タンク
２０に導き、この希釈用タンク２０でタンク２１からラ
イン２２を介して供給される希釈水で分級しやすい濃度
まで薄める。すなわち、石炭１５〜４０重量−の希釈低
濃度スラリにする。この希釈低ｒ！！４度スラリをライ
ン２５′ｔ−介して分級器２４に供給して粗粒含有希釈
低濃度スラリと粗粒カット希釈低濃度スラリとに分級す
る。そして、分級器２４で得られる粗粒含有希釈低濃度
スラリを返送循環ライン２５を介して粗粉砕ミル５ａに
返送し、含有されている粗粒をさらに粗粉砕ミル５ａで
細小又は微小石炭粒に粉砕する。一方、分級器２４で得
られる粗粒カット希釈低濃度スラリはライン２６を介し
て脱灰装置２７に供給し、脱灰して生じる灰はライン２
８から排出し、一方粗粒カット希釈低＃度脱灰スラリは
ライン２９によって脱水機７に供給する。In such an embodiment shown in the second diagram, the coal storage tank 1
Coal and coarse grinding mill feed water from the feed water tank 3 are supplied to the coarse grinding mill 5a via lines 2 and 4, and coarsely ground at a low concentration to produce a low concentration slurry of 60% by weight of coal 20S. This low-concentration slurry is led to a dilution tank 20 through a line 6, and is diluted in this dilution tank 20 with dilution water supplied from a tank 21 through a line 22 to a concentration that can be easily classified. That is, it is made into a diluted low concentration slurry of 15 to 40 parts by weight of coal. This dilution is low! ! The 4-degree slurry is supplied to the classifier 24 through the line 25't-, and is classified into a coarse grain-containing diluted low concentration slurry and a coarse grain cut diluted low concentration slurry. Then, the diluted low concentration slurry containing coarse particles obtained in the classifier 24 is returned to the coarse pulverizing mill 5a via the return circulation line 25, and the contained coarse particles are further crushed into fine or fine coal particles by the coarse pulverizing mill 5a. Smash. On the other hand, the coarse grain cut diluted low concentration slurry obtained by the classifier 24 is supplied to the deashing device 27 via the line 26, and the ash produced by deashing is sent to the line 2.
8, while the coarse cut diluted low grade demineralized slurry is supplied to the dehydrator 7 via line 29.

そして脱水機７で脱水して生じる脱水水はライン８から
排出し、一方脱水脱灰ケーキはライン９ａを介して腕枠
装置１０に供給する。腕枠装置１０では第１図に示すよ
うに板あるいはこの板に振動を与えることに工って脱水
脱灰ケーキを均等に小さく塊砕し、この小塊状粗粒カッ
ト脱水脱灰ケーキはライン１１ａを介してスラリ調整槽
１２に供給する。スラリ調整槽１２では脱水脱灰ケーキ
、スラリの水分濃度ヲｐ！整するための調整水用タンク
１３からライン１４′ｆ：介して供給される調整水、添
加剤用タンク１５からライン１６を介して供給される添
加剤および超微粉砕ミル３５で得られる超微小粒含有熟
成脱灰スラリを一緒に混合攪拌しながら濃度などが適轟
なものになるように調整する。このスラリ調整槽１２で
調整して得られる調整高濃度脱灰スラリ全ライン１７ａ
からポンプ１８に工って熟成機３０に送シ込み、この熟
成機５０でさらに混合かつ攪拌して熟成することに１っ
て粘度の低い均一性のある良質の熟成高濃度脱灰スラリ
を得る。Dehydrated water produced by dewatering in the dehydrator 7 is discharged from a line 8, while a dehydrated and deashed cake is supplied to the arm frame device 10 via a line 9a. In the arm frame device 10, as shown in FIG. 1, the dehydrated and demineralized cake is evenly crushed into small pieces by applying vibrations to the plate or this plate, and the dehydrated and demineralized cake is crushed into small pieces in the form of small chunks and then passed through the line 11a. The slurry is supplied to the slurry adjustment tank 12 via. In the slurry adjustment tank 12, the water concentration of the dehydrated demineralized cake and slurry is adjusted! Conditioned water supplied from tank 13 for conditioning water through line 14'f: Additives fed from additive tank 15 through line 16 and ultrafine powder obtained by ultrafine mill 35. The aged demineralized slurry containing small particles is mixed and stirred together to adjust the concentration to an appropriate level. All lines 17a of adjusted high concentration deashing slurry obtained by adjusting in this slurry adjustment tank 12
The slurry is fed to the ripening machine 30 by the pump 18, and then further mixed and stirred in the ripening machine 50 for ripening, thereby obtaining a high-quality aged high-concentration demineralized slurry with low viscosity and uniformity. .

熟成機３０はスラリ調整槽１２に投入した脱水ケーキ、
超微小粒含有スラリ、水、添加剤が完全に混線・混合さ
れていない可能性があるので、これを解決するために設
けられたものであシ、一般には高速攪拌などによってこ
れら混合物の均一な再分散をさせる作用をするものであ
る。この熟成高濃度脱灰スラリを分配器３２に供給し、
その１部はライン３３を介してポンプ３４によって超微
粉砕ミル３５に供給する。この超微粉砕ミル３５に供給
される返送熟成高濃度脱灰スラリ中の石炭粒は超微粉砕
されながら摩砕され、混合攪拌される。こうして得られ
る丸味のある超微小粒の石炭粒を多量に含み適尚な粘度
に練られた返送超微小粒含有熟成脱灰スラリをライン３
６ｔ−介してスラリ調整槽１２に返送し、上述のＬうに
スラリ調整槽１２で脱水脱灰ケーキ、調整水、添加剤と
ともに混合攪拌することによって粘度の低い均一性のあ
る良質の調整高濃度脱灰スラリを得る。この良質の調整
高濃度脱灰スラリは上述するように熟成機３０で混合攪
拌し、かつ熟成したのち分級器３２に供給し、１部はラ
イン５３に工って返送され、他の熟成高濃度脱灰スラリ
は分配器５２から製品高濃度スラリとしてライン３７か
ら製品高濃度スラリ用のタンク１９に輸送して貯留する
。The ripening machine 30 is a dehydrated cake fed into a slurry adjustment tank 12,
This was designed to solve the problem that the slurry containing ultrafine particles, water, and additives may not be completely crossed or mixed.Generally, high-speed stirring is used to ensure that the mixture is uniform. It acts to redisperse. This aged highly concentrated demineralized slurry is supplied to the distributor 32,
A portion thereof is fed via line 33 by pump 34 to micronization mill 35 . The coal grains in the return matured highly concentrated demineralized slurry supplied to this ultrafine grinding mill 35 are ground while being ultrafinely ground, and are mixed and stirred. The aged demineralized slurry containing ultra-fine particles is returned to line 3, which contains a large amount of rounded ultra-fine coal particles and has been kneaded to an appropriate viscosity.
The slurry is returned to the slurry adjustment tank 12 via the L-6t, and mixed and stirred with the dehydrated demineralized cake, adjusted water, and additives in the slurry adjustment tank 12 described above to produce a high-quality, uniform, and highly concentrated slurry with low viscosity. Obtain ash slurry. This high-quality adjusted high-concentration demineralized slurry is mixed and stirred in the ripening machine 30 as described above, and after being matured, it is supplied to the classifier 32. One part is returned to the line 53, and the other matured high-concentration slurry is The demineralized slurry is transported from the distributor 52 as a high-concentration product slurry through a line 37 to a tank 19 for high-concentration product slurry, where it is stored.

なお、第２図にて示す実施例においては、希釈用タンク
２０、分級器２４、分級器２４で得られ粗粒含有希釈低
濃度スラリのライン２５による返送、脱灰装置２７、熟
成機３０、超微粉砕ミル３５を利用して得られる超微小
粒含有熟成脱灰スラリの返送などは、石炭の種類、要求
される製品高濃度スラリの性状などにＬつで適宜任意に
組合せて適用しても良い。In the embodiment shown in FIG. 2, a dilution tank 20, a classifier 24, return of the diluted low-concentration slurry containing coarse particles obtained by the classifier 24 through a line 25, a deashing device 27, a ripening device 30, When returning aged demineralized slurry containing ultrafine particles obtained using the ultrafine grinding mill 35, L can be used in any combination as appropriate depending on the type of coal, the required properties of the high concentration slurry, etc. Also good.

（発明の効果） 本発明の効果は、脱水ケーキと調整水、添加剤を混合、
攪拌するスラリ調整槽に著しく現われる。すなわち、次
の通りである。(Effect of the invention) The effect of the invention is that the dehydrated cake, adjusted water, and additives are mixed,
It appears noticeably in the stirring slurry adjustment tank. That is, as follows.

（１）大塊状脱水ケーキに比べて、小塊枠状となるとス
ラリ調整槽の混合攪拌翼での混合、攪拌が容易になり、
攪拌所要動力の低下が可能となる。(1) Compared to a large block-shaped dehydrated cake, a small block frame shape is easier to mix and stir with the mixing agitation blade of the slurry adjustment tank.
It is possible to reduce the power required for stirring.

（２）　　大塊状脱水ケーキの場合、スラリ調整槽の混
合攪拌翼に大塊状脱水ケーキが固体として衝突し、成る
いはその大塊状脱水ケーキを伴なう高濃度スラリ全攪拌
する為、攪拌翼駆動動力の変動が大きいが、小塊枠状脱
水ケーキの場合、変動が小さく、安定した攪拌が可能で
ある。また攪拌翼駆動モータのトリップの心配が無い。(2) In the case of large dehydrated cakes, the large dehydrated cakes collide as solids with the mixing stirring blades of the slurry adjustment tank, or the stirring blades completely stir the high concentration slurry accompanied by the large dehydrated cakes. Although the fluctuation of the driving power is large, in the case of a small block frame-shaped dehydrated cake, the fluctuation is small and stable stirring is possible. Furthermore, there is no need to worry about tripping of the stirring blade drive motor.

第３図は、攪拌翼駆動動力の変動状態、及び攪拌所要動
力の違いを示している。図中、データ八は大塊状脱水ケ
ーキ供給の場合、データＢは小塊状脱水ケーキ供給の場
合である。FIG. 3 shows the fluctuation state of the stirring blade driving power and the difference in the required stirring power. In the figure, data 8 is for supplying large dehydrated cakes, and data B is for supplying small dehydrated cakes.

（３）　　上記＋１１．　（２１の結果、同一攪拌容積
での脱水ケーキ処理量は、混合、攪拌状態全同一とすれ
ば、小塊枠状脱水ケーキの方が多いことが明らかである
。(3) Above +11. (As a result of 21, it is clear that the amount of dehydrated cake processed with the same stirring volume is larger for the small block frame-shaped dehydrated cake if the mixing and stirring conditions are all the same.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図及び第２図は本発明方法の一実施態様例を示す図
で、第１図が１部の詳細説明図、第２図が全体のフロー
を示す図、第３図は本発明の詳細な説明するための図、
第４図及び第５図は従来の方法を説明するための図であ
る。 復代理人　　内　１）　　明 復代理人　　萩　原　亮　− 復代理人　　安　西　篤　夫 第２図 経過日群間　　（ろ）） 第４図1 and 2 are diagrams showing an embodiment of the method of the present invention, in which FIG. 1 is a detailed explanatory diagram of a part, FIG. 2 is a diagram showing the overall flow, and FIG. 3 is a diagram showing an embodiment of the method of the present invention. Diagrams for detailed explanation,
FIGS. 4 and 5 are diagrams for explaining the conventional method. Sub-Agents 1) Meifu Agent Ryo Hagiwara - Sub-Agent Atsuo Anzai Figure 2 Elapsed Days Between Groups (Ro)) Figure 4

Claims (1)

【特許請求の範囲】[Claims] 石炭を水中で湿式ミルによつて粗粉砕して低濃度石炭水
スラリを作り、次いで該低濃度石炭水スラリを脱水、又
は粗粒子分級後脱水し、得られる脱水ケーキをスラリ調
整槽に導き、同スラリ調整槽で供給される調整水、添加
剤とともに混合、攪拌しながら調整して調整高濃度石炭
水スラリを作る高濃度石炭水スラリ製造方法において、
前記スラリ調整槽に導く前記脱水ケーキを、脱水機又は
脱水ケーキ搬送コンベヤから一段又は数段の傾斜した平
板又は表面が波状又は突起状の板の上に落下させて塊砕
し、しかる後前記スラリ調整槽に供給することを特徴と
する高濃度石炭水スラリの製造方法。Coarsely pulverizing coal in water with a wet mill to create a low concentration coal water slurry, then dewatering the low concentration coal water slurry or dewatering it after coarse particle classification, leading the resulting dehydrated cake to a slurry adjustment tank, In the high concentration coal water slurry production method, the adjusted high concentration coal water slurry is prepared by mixing and stirring the adjusted water and additives supplied in the same slurry adjustment tank, and adjusting the adjusted high concentration coal water slurry.
The dehydrated cake led to the slurry adjustment tank is dropped from a dehydrator or a dehydrated cake conveyor onto one or more sloping flat plates or plates with corrugated or protruding surfaces to be crushed, and then the slurry is A method for producing a highly concentrated coal-water slurry, which comprises supplying the slurry to a regulating tank.