JPH0576986B2 - - Google Patents
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- Publication number
- JPH0576986B2 JPH0576986B2 JP16145985A JP16145985A JPH0576986B2 JP H0576986 B2 JPH0576986 B2 JP H0576986B2 JP 16145985 A JP16145985 A JP 16145985A JP 16145985 A JP16145985 A JP 16145985A JP H0576986 B2 JPH0576986 B2 JP H0576986B2
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- demineralized
- coal
- concentration
- coarse
- 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 - Fee Related
Links
- 239000002002 slurry Substances 0.000 claims description 339
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 84
- 239000003245 coal Substances 0.000 claims description 82
- 239000000654 additive Substances 0.000 claims description 37
- 239000011882 ultra-fine particle Substances 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 26
- 238000010298 pulverizing process Methods 0.000 claims description 24
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 230000003750 conditioning effect Effects 0.000 claims description 8
- 230000001143 conditioned effect Effects 0.000 claims description 3
- 238000000227 grinding Methods 0.000 description 59
- 239000011362 coarse particle Substances 0.000 description 31
- 238000000034 method Methods 0.000 description 21
- 230000000694 effects Effects 0.000 description 19
- 230000032258 transport Effects 0.000 description 19
- 238000002485 combustion reaction Methods 0.000 description 18
- 238000010790 dilution Methods 0.000 description 16
- 239000012895 dilution Substances 0.000 description 16
- 238000002156 mixing Methods 0.000 description 12
- 238000003860 storage Methods 0.000 description 11
- 230000000996 additive effect Effects 0.000 description 9
- 238000005054 agglomeration Methods 0.000 description 9
- 230000002776 aggregation Effects 0.000 description 9
- 238000003756 stirring Methods 0.000 description 7
- 239000008400 supply water Substances 0.000 description 7
- 230000018044 dehydration Effects 0.000 description 6
- 238000006297 dehydration reaction Methods 0.000 description 6
- 230000002195 synergetic effect Effects 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005115 demineralization Methods 0.000 description 2
- 230000002328 demineralizing effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
Landscapes
- Crushing And Grinding (AREA)
- Liquid Carbonaceous Fuels (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は高濃度石炭水スラリの製造方法におい
て、特に脱灰システムを採用することによつてス
ラリの性状を良好にするための製造方法に関する
ものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for producing highly concentrated coal-water slurry, and particularly to a method for improving the properties of the slurry by employing a deashing system. It is something.
高濃度石炭水スラリとは、微粉砕した石炭60〜
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
を飛躍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。
High concentration coal water slurry is finely ground coal 60~
It is a mixture of 90% by weight and 10-40% by weight of water with some additives, and is a fluid fuel that can be burned as is in a boiler etc. without dehydration, and it converts coal, which is a solid fuel, into a fluid. This dramatically expands the scope of use. 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３種類が
あつた。 Conventionally, methods for producing high-concentration slurry can be roughly divided into three types: dry method, high-concentration wet method, and 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諸に混合・撹拌
（以下混合撹拌と記す）して高濃度スラリとする
ものである。 The dry method uses a mill to pulverize coal in the air, and then mixes and stirs it with water and additives (hereinafter referred to as mixing and stirring) to form a highly concentrated slurry.
また、高濃度湿式法はチユーブミルに石炭、水
及び添加剤を同時に投入し、微粉砕と混合撹拌を
同時に行なうものである。 Further, 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、低濃度湿式法はチユーブミルに石炭と
水とを投入して低濃度で微粉砕し、いつたん石炭
20〜60重量％と水40〜80重量％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、これを混合撹拌機内において改めて少量の
調整水と添加剤と一諸に混合撹拌して高濃度スラ
リとするものである。 Furthermore, the low concentration wet method involves putting coal and water into a tube mill and pulverizing it at a low concentration.
After making a low-concentration slurry of 20 to 60% by weight and 40 to 80% by weight of water, this is dehydrated in a dehydrator to form a dehydrated cake, which is again mixed with a small amount of adjusted water and additives in a mixer. The mixture is mixed and stirred to form a highly concentrated slurry.
第１２図に図示するものは、従来の低濃度湿式
高濃度スラリの製造方法に関するフローシートで
ある。 What is illustrated in FIG. 12 is a flow sheet relating to a conventional method for producing a low-concentration wet high-concentration slurry.
第１２図において、ａは石炭の供給用貯留槽、
ｂは石炭の供給ライン、ｃはミル供給水用のタン
ク、ｄはミル供給水の供給ライン、ｅは湿式ミ
ル、ｆは湿式ミルｅで得られた低濃度スラリの輸
送ライン、ｇは脱水機、ｈは脱水機ｇで脱水して
得られた脱水水の排水ライン、ｉは脱水機ｇで脱
水して得られたスラリ（以下脱水ケーキと記す）
の輸送ライン、ｊは混合撹拌機、ｋは混合撹拌ｊ
に調整水の供給ラインｌを介して調整水を供給す
る調整水用のタンク、ｍは混合撹拌機ｊに添加剤
を供給ラインｎを介し供給する添加剤用のタン
ク、ｏは製品である高濃度スラリの輸送ライン、
ｐは製品である高濃度スラリの貯蔵タンク又はボ
イラの燃焼手段（以下製品スラリ用タンクと記
す）である。 In FIG. 12, a is a storage tank for supplying coal;
b is a coal supply line, c is a tank for mill supply water, d is a mill supply water supply line, e is a wet mill, f is a transport line for the low concentration slurry obtained in the wet mill e, and g is a dehydrator. , h is the drainage line of the dehydrated water obtained by dehydrating with dehydrator g, and i is the slurry obtained by dehydrating with dehydrator g (hereinafter referred to as dehydrated cake).
transportation line, j is mixing agitator, k is mixing agitator j
A tank for adjusting water is supplied through a supply line l of adjusted water, m is a tank for additives supplying additives to a mixing agitator j through a supply line n, and o is a tank for supplying the adjusted water to the mixing agitator j through a supply line n. Concentrated slurry transportation line,
p is a storage tank for high-concentration slurry as a product or a combustion means of a boiler (hereinafter referred to as a tank for product slurry).
このようなフローシイートにおいて、貯留槽ａ
及びタンクｃからラインｂ及びｄを介して石炭及
びミル供給水を湿式ミルｅに供給し、低濃度で粗
粉砕処理して低濃度スリを作る。この低濃度スラ
リをラインｆによつて脱水機ｇへ供給する。脱水
機ｇでは低濃度スラリを脱水し、脱水水はライン
ｈから排水し、脱水ケーキはラインｉを介して混
合撹拌機ｊに供給する。この混合撹拌ｊでは供給
されてきた脱水ケーキにタンクｋ及びｍからライ
ンｌ及びｎを介して供給される調整水及び添加剤
を一諸に混合撹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のラインｏから製
品スラリ用タンクｐに供給する。 In such a flow sheet, the storage tank a
Coal and mill supply water are supplied from tank c to wet mill e through lines b and d, and coarsely pulverized at a low concentration to produce low-concentration slurry. This low concentration slurry is supplied to the dehydrator g via line f. In the dehydrator g, the low concentration slurry is dehydrated, the dehydrated water is drained from the line h, and the dehydrated cake is supplied to the mixer j through the line i. In this mixing/stirring j, the supplied dehydrated cake is mixed and stirred with the conditioning water and additives supplied from tanks k and m via lines l and n to form a highly concentrated slurry with low viscosity. The slurry is supplied from the high concentration slurry line o to the product slurry tank p.
このような従来の低濃度湿式法高濃度スラリの
製造方法においては、混合撹拌機ｊからラインｏ
を介して製品として出て来る高濃度スラリは、湿
式ミルｅで石炭を粗粉砕し脱水したのち調整水と
添加剤とを供給して調整したものであるから高濃
度スラリ中には粉砕時に出来た微小遊離灰（以下
灰分と略記する）が発生し、そのためスラリー単
位重量当りの発熱量が小さい。
In such a conventional method for producing high concentration slurry using a low concentration wet method, a line o is
The high-concentration slurry that comes out as a product is prepared by coarsely pulverizing and dehydrating coal in a wet mill and then supplying conditioning water and additives. Microscopic free ash (hereinafter abbreviated as ash) is generated, and therefore the calorific value per unit weight of slurry is small.
また、その灰分のためボイラ内燃焼の際バーナ
中のつまりを生じ、高濃度スラリの安定供給を阻
害することもあつた。 In addition, the ash content caused clogging in the burner during combustion in the boiler, which sometimes hindered the stable supply of high-concentration slurry.
さらに、その灰分によつて燃焼後の多量の灰分
が発生し、特にボイラ内燃焼においてはその多量
の灰分の処理のため灰処理設備が大型化しまた処
理に多大の作業を要していた。 Furthermore, a large amount of ash is generated after combustion due to the ash content, and in particular, in combustion in a boiler, ash processing equipment has become large in order to process the large amount of ash content, and a large amount of work is required for processing.
さらにまた、混合撹拌機ｊからラインｏを介し
て製品として出て来る高濃度スラリは、湿式ミル
ｅで石炭を粗粉砕するのみであるので石炭粒の形
状は角ばつており、したがつて添加剤と混合撹拌
した場合、添加剤がうまく分散しなかつた。この
ため、添加剤の効果が充分に発揮できず、また粘
度の低い高濃度スラリを得ることが出来なかつ
た。 Furthermore, the highly concentrated slurry that comes out as a product from the mixer j through the line o is obtained by only coarsely pulverizing the coal in the wet mill e, so the shape of the coal particles is angular. When mixed with the additive and stirred, the additive was not well dispersed. For this reason, the effects of the additives could not be fully exhibited, and a highly concentrated slurry with low viscosity could not be obtained.
また、湿式ミルｅで石炭を粗粉砕するのみであ
るので微小又は超微小石炭粒は少量しか生成され
なかつた。したがつて、従来の高濃度スラリ中に
も微小又は超微小石炭粒は少量しか含まれてな
く、そのため高濃度スラリのレオロジー特性はダ
イラタントとなり貯蔵安定性が劣るという欠点が
あつた。 In addition, since the wet mill e only coarsely pulverizes the coal, only a small amount of fine or ultrafine coal particles were produced. Therefore, conventional high-concentration slurries contain only a small amount of fine or ultra-fine coal particles, and as a result, the rheological properties of high-concentration slurries are dilatant, resulting in poor storage stability.
さらに、高濃度スラリのレオロジー特性を擬塑
性とし、貯蔵安定性を向上させるために何らかの
方法でミル内において微小又は超微小石炭粒を生
成させとしても、低濃度スラリ中に微小又は超微
小石炭粒が多量に含まれる場合には脱水機の脱水
性能が著るしく低下し、脱水ケーキ中の水分が増
加し、したがつて出来上がつた高濃度スラリの濃
度が低下するという欠点があつた。 Furthermore, even if fine or ultra-fine coal particles are generated in the mill by some method to make the rheological properties of high-concentration slurry pseudoplastic and improve storage stability, fine or ultra-fine coal particles in low-concentration slurry If a large amount of coal particles are included, the dewatering performance of the dehydrator will be significantly reduced, and the moisture content in the dehydrated cake will increase, resulting in a decrease in the concentration of the finished highly concentrated slurry. Ta.
さらにまた、従来の低濃度湿式法高濃度スラリ
の製造方法においては、混合撹拌機ｊからライン
ｏを介して製品として出て来る高濃度スラリには
バラツキすなわち品質の均一性の問題があり、そ
の結果、ボイラ等で使用した場合に燃焼状態がマ
チマチになる可能性があつた。 Furthermore, in the conventional low-concentration wet method for producing high-concentration slurry, there is a problem in that the high-concentration slurry that comes out as a product from mixer j through line o has variations, that is, uniformity of quality. As a result, when used in a boiler or the like, there was a possibility that the combustion state would be inconsistent.
本発明は、上記する従来の低濃度湿式高濃度ス
ラリの製造方法の諸問題を解消し、燃焼前に石炭
に含まれる灰分を除いてスラリ単位重量当りの発
熱量が大きい燃料となるとともに、従来石炭のボ
イラ内燃焼によつて生じていた多量の灰分処理を
不必要とし、かつ灰付着によるトラブルを排除し
て、しかも粘性の低い均一性のある良質の高濃度
スラリを得ることを目的として提供するものであ
る。 The present invention solves the problems of the conventional low-concentration wet high-concentration slurry manufacturing method described above, and removes the ash contained in coal before combustion to produce a fuel with a large calorific value per unit weight of slurry. The purpose of this product is to eliminate the need to process the large amount of ash that occurs when coal is burned in a boiler, eliminate problems caused by ash adhesion, and obtain high-quality, highly concentrated slurry with low viscosity and uniformity. It is something to do.
本発明の第１発明は、石炭を水中で粗粉砕ミル
によつて粗粉砕して低濃度スラリを作り、ついで
上記低濃度スラリを脱灰したのち脱水し、得られ
る脱灰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、添加剤及び上記脱
灰脱水ケーキを、返送されてくる返送超微小粒含
有灰脱スラリとともに混合撹拌しながら調整し、
ついで上記スラリ調整槽で得られる調整高濃度脱
灰スラリを製品として供給しかつ上記調整高濃度
脱灰スラリの１部を超微粉砕ミルに導き、同超微
粉砕ミルで上記調整高濃度脱灰スラリの石炭粒を
超微粉砕して超微小粒含有脱灰スラリとしたのち
上記スラリ調整槽に返送循環させることを特徴と
する高濃度スラリの製造方法である。
The first aspect of the present invention is to coarsely crush coal in water using a coarse crushing mill to create a low concentration slurry, then demineralize and dehydrate the low concentration slurry, and adjust the resulting deashed and dehydrated cake into a slurry. The adjusted water, additives, and deashed and dehydrated cake supplied in the same slurry adjusting tank are mixed and stirred together with the returned ash deslurry containing ultrafine particles,
Next, the adjusted high-concentration demineralized slurry obtained in the slurry adjustment tank is supplied as a product, and a part of the adjusted high-concentration demineralized slurry is led to an ultra-fine pulverization mill, where the adjusted high-concentration demineralized slurry is This method of producing a highly concentrated slurry is characterized in that the coal particles in the slurry are ultrafinely pulverized to obtain a demineralized slurry containing ultrafine particles, which is then returned and circulated to the slurry adjustment tank.
粗粉砕ミルに石炭と水とを供給して粗粉砕処理
し水分の多い低濃度スラリを作る。この低濃度ス
ラリは灰分および水分が多いのでこのままではボ
イラ等での燃焼効率に悪影響を与えるため、また
スラリ調整槽で得られるスラリの水分濃度を均一
化するために脱灰したのち脱水する。この脱灰し
たのち脱水して得られる脱灰脱水ケーキをスラリ
調整槽に導く。スラリ調整槽には、スラリの水分
濃度調整のための調整水、添加剤及び上記脱灰脱
水ケーキと、超微粉砕ミルで作られた返送超微小
粒含有脱灰スラリとを一諸に混合撹拌しらがら調
整して調整高濃度脱灰スラリを得る。この調整高
濃度脱灰スラリは製品として供給する一方その１
部は上記超微粉砕ミルに供給し調整高濃度脱灰ス
ラリに含有されている石炭粒を超微粉砕して丸味
のある超微小の石炭粒を作つて再度上記スラリ調
整槽に返送させながら灰分が少なくしかも均一性
のある良質の製品を作る。
Coal and water are supplied to a coarse grinding mill for coarse grinding to produce a low concentration slurry with a high moisture content. This low-concentration slurry contains a lot of ash and moisture, so if left as it is, it will have a negative effect on the combustion efficiency in boilers, etc., and in order to equalize the moisture concentration of the slurry obtained in the slurry adjustment tank, it is deashed and then dehydrated. The deashed and dehydrated cake obtained by deashing and dewatering is led to a slurry adjustment tank. In the slurry adjustment tank, adjusted water for adjusting the moisture concentration of the slurry, additives, and the above-mentioned decalcified dehydrated cake are mixed and stirred with the returned demineralized slurry containing ultrafine particles made by the ultrafine grinding mill. Adjust the slurry to obtain a highly concentrated demineralized slurry. This adjusted high-concentration demineralized slurry is supplied as a product, and part 1
The part is supplied to the ultra-fine grinding mill and the coal particles contained in the adjusted highly concentrated demineralized slurry are ultra-finely pulverized to produce rounded ultra-fine coal particles, which are then returned to the slurry adjustment tank. To produce a high quality product with low ash content and uniformity.
本発明の第１発明の好ましい実施例を第１図に
図示する実施例で詳述する。
A preferred embodiment of the first aspect of the present invention will be described in detail with reference to the embodiment illustrated in FIG.
第１図に図示する実施例は、第１発明に係る実
施例のフローシイートである。 The embodiment illustrated in FIG. 1 is a flow sheet of the embodiment according to the first invention.
第１図において、１は石炭の供給貯留槽、２は
石炭の供給ライン、３は粗粉砕湿式ミル供給水用
のタンク、４は粗粉砕湿式ミル供給水（以下粗粉
砕ミル供給水と記す）の供給ライン、５は粗粉砕
湿式ミル（以下粗粉砕ミルと記す）６は粗粉砕ミ
ル５で得られる低濃度スラリの輸送ライン、７は
加圧水による浮上分離操作などで脱灰処理をする
脱灰装置、８は脱灰装置７で得られた灰の排出ラ
イン、９は脱灰装置７で得られる低濃度脱灰スラ
リの輸送ライン、１０は脱水機、１１は脱水機１
０で得られる脱水水の排水ライン、１２は脱水機
１０で得られる脱灰脱水ケーキの輸送ライン、１
３はスラリ調整槽又は混合撹拌機（以下スラリ調
整槽で代表する）、１４はスラリ調整槽１３の脱
灰スラリの水分濃度を調整するために供給する水
（以下調整水と記す）を貯蔵する調整水用タンク、
１５は調整水の供給ライン、１はスラリ調整槽１
３に供給する界面活性剤などの添加剤（以下添加
剤と記す）を貯蔵するタンク（以下添加剤用タン
クと記す）、１７は添加剤の供給ライン、１８は
スラリ調整槽１３で調整された高濃度脱灰スラリ
（以下調整高濃度脱灰スラリと記す）の輸送ライ
ン、１９は調整高濃度脱灰スラリの輸送ポンプ、
２０は調整高濃度脱灰スラリの分配器、２１は調
整高濃度脱灰スラリの１部（以下返送調整高濃度
脱灰スラリと記す）の返送循環ライン、２２は返
送調整高濃度脱灰スラリの返送循環用輸送ポン
プ、２３は超微粉砕ミル、２４は超微粉砕ミル２
３で得られた超微小粒含有脱灰スラリの返送循環
ライン、２５は製品として又は次の工程へ供給さ
れる高品質の高濃度脱灰スラリ（以下製品高濃度
脱灰スラリと記す）の輸送ライン、２６は製品と
して又は次工程へ供給する製品高濃度脱灰スラリ
を貯留するタンク（以下製品高濃度脱灰スラリ用
タンクと記す）である。なお、ライン２５は図示
省略のボイラ等の燃焼手段に直接連結されること
もあるが、この事についての説明は以下同様なの
で省略する。 In Figure 1, 1 is a coal supply storage tank, 2 is a coal supply line, 3 is a tank for coarse grinding wet mill supply water, and 4 is coarse grinding wet mill supply water (hereinafter referred to as coarse grinding mill supply water). 5 is a coarse grinding wet mill (hereinafter referred to as coarse grinding mill); 6 is a transportation line for the low concentration slurry obtained by the coarse grinding mill 5; 7 is a deashing line for deashing by flotation separation using pressurized water, etc. 8 is a discharge line for the ash obtained in the deashing device 7; 9 is a transport line for the low concentration deashed slurry obtained in the deashing device 7; 10 is a dehydrator; 11 is the dehydrator 1
1 is a drainage line for the dehydrated water obtained at 0; 12 is a transport line for the deashed and dehydrated cake obtained at the dehydrator 10;
3 is a slurry adjustment tank or a mixing agitator (hereinafter referred to as slurry adjustment tank), and 14 stores water (hereinafter referred to as adjustment water) to be supplied to adjust the water concentration of the demineralized slurry in slurry adjustment tank 13. Adjustment water tank,
15 is a supply line for conditioning water, 1 is a slurry conditioning tank 1
3 is a tank (hereinafter referred to as an additive tank) for storing additives such as surfactants (hereinafter referred to as additives), 17 is an additive supply line, and 18 is a slurry adjustment tank 13. A transport line for high-concentration demineralized slurry (hereinafter referred to as adjusted high-concentration demineralized slurry); 19 is a transport pump for adjusted high-concentration demineralized slurry;
20 is a distributor for the adjusted high-concentration demineralized slurry, 21 is a return circulation line for a portion of the adjusted high-concentration demineralized slurry (hereinafter referred to as the returned adjusted high-concentration demineralized slurry), and 22 is a distributor for the adjusted high-concentration demineralized slurry to be returned. Transport pump for return circulation, 23 is ultra-fine grinding mill, 24 is ultra-fine grinding mill 2
25 is a return circulation line for the demineralized slurry containing ultrafine particles obtained in step 3, and 25 is a line for transporting high-quality high-concentration demineralized slurry (hereinafter referred to as product high-concentration demineralized slurry) to be supplied as a product or to the next process. Line 26 is a tank (hereinafter referred to as a tank for product high concentration demineralized slurry) that stores product high concentration demineralized slurry to be supplied as a product or to the next process. Note that the line 25 may be directly connected to a combustion means such as a boiler (not shown), but a description of this will be omitted since it is the same below.
第１図に図示する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５に供給し、低濃度で粗粉砕処理し石炭20〜60
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によつて脱灰装置７に供給し、脱灰し
て生じる灰はライン８から排出し、一方低濃度脱
灰スラリはライン９によつて脱水機１０に供給す
る。そして脱水機１０で脱水して生じる脱水水は
ライン１１から排出し、一方脱灰脱水ケーキはラ
イン１２を介してスラリ調整槽１３に供給する。
スラリ調整槽１３では脱灰脱水ケーキ、スラリの
水分濃度を調整するために調整水用タンク１４か
らライン１５を介して供給される調整水、添加剤
用タンク１６からライン１７を介して供給される
添加剤および超微粉砕ミル２３で得られる超微小
粒含有脱灰スラリを一諸に混合撹拌しながら濃度
などが適当なものになるように調整する。このス
ラリ調整槽１３で調整して得られる調整高濃度脱
灰スラリをライン１８からポンプ１９によつて分
配器２０に供給し、その１部はライン２１を介し
てポンプ２２によつて超微粉砕ミル２３に供給す
る。この超微粉砕ミル２３に供給される返送調整
高濃度脱灰スラリ中の石炭粒は超微粉砕され、混
合撹拌される。 In such an embodiment illustrated in FIG.
The coal in the coal storage tank 1 and the coarse grinding mill feed water in the feed water tank 3 are supplied to the coarse grinding mill 5 via lines 2 and 4, and are coarsely ground at a low concentration to produce coal of 20 to 60 ml.
Make a slurry with a low concentration of % by weight. This low concentration slurry is supplied to a deashing device 7 through line 6, and the ash produced by deashing is discharged through line 8, while the low concentration deashing slurry is supplied through line 9 to a dehydrator 10. Dehydrated water produced by dewatering in the dehydrator 10 is discharged from a line 11, while a deashed and dehydrated cake is supplied to a slurry adjustment tank 13 via a line 12.
In the slurry adjustment tank 13, a demineralized dehydrated cake, adjustment water supplied from an adjustment water tank 14 through a line 15 to adjust the water concentration of the slurry, and adjustment water supplied from an additive tank 16 through a line 17. The additives and the demineralized slurry containing ultrafine particles obtained in the ultrafine grinding mill 23 are mixed and stirred together to adjust the concentration to an appropriate value. The adjusted high-concentration demineralized slurry obtained by adjusting in the slurry adjustment tank 13 is supplied from a line 18 to a distributor 20 by a pump 19, and a part of it is ultrafinely pulverized by a pump 22 through a line 21. Supply to mill 23. The coal grains in the returned and adjusted high-concentration demineralized slurry supplied to this ultra-fine pulverization mill 23 are ultra-finely pulverized and mixed and stirred.
こうして得られる丸味のある超微小粒の石炭粒
を多量に含む返送超微小粒含有脱灰スラリをライ
ン２４を介してスラリ調整槽１３に返送し、上述
したようにスラリ調整槽１３で脱灰脱水ケーキ、
調整水、添加剤とともに混合撹拌することによつ
て灰分が少なくしかも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分配器２０
に供給し、１部はライン２１に返送され、他の調
整高濃度脱灰スラリは分配器２０から製品高濃度
脱灰スラリとしてライン２５から製品高濃度脱灰
スラリ用のタンク２６に輸送して貯留する。 The returned ultrafine particle-containing demineralized slurry containing a large amount of rounded ultrafine coal particles thus obtained is returned to the slurry conditioning tank 13 via the line 24, and is deashed and dehydrated in the slurry conditioning tank 13 as described above. cake,
By mixing and stirring together with conditioned water and additives, a high quality conditioned highly concentrated demineralized slurry with low ash content, low viscosity, and uniformity is obtained. This high quality adjusted high concentration demineralized slurry is transferred to the distributor 20 as described above.
One part is returned to the line 21, and the other adjusted high concentration demineralized slurry is transported from the distributor 20 as a product high concentration demineralized slurry through the line 25 to a tank 26 for the product high concentration demineralized slurry. Store.
第２図は、第１発明の第２実施例であり、２７
は超品粉砕ミル２３の脱灰スラリの水分濃度を調
整するために供給される水（以下、超微粉砕ミル
調整水と記す）を貯蔵する超微粉砕ミル調整水用
タンク、２８は超微粉砕ミル調整水の供給ライ
ン、２９は超微粉砕ミル２３に供給する界面活性
剤などの添加剤（以下超微粉砕ミルと記す）を貯
蔵するミル添加剤用タンク、３０は超微粉砕ミル
添加剤の供給ラインである。 FIG. 2 shows a second embodiment of the first invention, 27
28 is an ultra-fine grinding mill adjustment water tank that stores water supplied to adjust the water concentration of the demineralized slurry of the ultra-fine grinding mill 23 (hereinafter referred to as ultra-fine grinding mill adjustment water); A supply line for grinding mill adjustment water, 29 a mill additive tank for storing additives such as surfactants (hereinafter referred to as the ultrafine mill) to be supplied to the ultrafine grinding mill 23, and 30 an ultrafine grinding mill additive This is the agent supply line.
そして、第２図に図示する実施例においては、
超微粉砕ミル２３内の脱灰スラリの水分濃度、粘
性などを調整するために超微粉砕ミル２３にタン
ク２７からライン２８を介して超微粉砕ミル調整
水及びタンク２９からライン３０を介して超微粉
砕ミル添加剤を供給して供給されてくる返送調整
高濃度脱灰スラリと一諸に超微粉砕しながら摩砕
しかつ混合撹拌して適当な水分濃度（例えば石炭
55％）、粘度にしてスラリ調整槽１３へ返送する。 In the embodiment illustrated in FIG.
In order to adjust the water concentration, viscosity, etc. of the demineralized slurry in the ultrafine grinding mill 23, ultrafine grinding mill adjustment water is supplied from the tank 27 to the ultrafine grinding mill 23 via a line 28 and from the tank 29 via a line 30. Ultra-fine grinding mill additives are supplied and the returned adjusted high-concentration deashing slurry is ground while being ultra-finely ground, mixed and stirred to obtain an appropriate moisture concentration (for example, coal).
55%), viscosity, and returned to the slurry adjustment tank 13.
以上、第１発明に係る実施例を示す第１図およ
び第２図のフローシイートに基づいて詳述したよ
うに第１発明によつて次のような効果が得られ
る。 As described above in detail based on the flow sheets of FIGS. 1 and 2 showing the embodiment of the first invention, the following effects can be obtained by the first invention.
(1) 粗粉砕ミルでは、粉砕動力が最小となる低濃
度（石炭20〜60重量％）で粉砕を行なうので、
粉砕動力が最小の点で運転が可能となる。
(1) In the coarse grinding mill, grinding is carried out at a low concentration (20 to 60% by weight of coal), which minimizes the grinding power.
Operation is possible at the point where the crushing power is minimum.
(2) 粗粉砕ミルで石炭を粗粉砕したのち脱灰する
ので、粗粉砕によつて生じる灰分（微小遊離
灰）が除去される。したがつて製品である高濃
度スラリには灰が除去されており燃焼効率が向
上する。(2) Since the coal is coarsely crushed in a coarse crushing mill and then deashed, the ash (fine free ash) produced by the coarse crushing is removed. Therefore, the ash is removed from the highly concentrated slurry product, which improves combustion efficiency.
また、脱灰によつて燃焼時におけるバーナ中
の灰分によるつまりの心配もなくなり高濃度ス
ラリが安定供給される。 Moreover, by deashing, there is no need to worry about clogging due to ash in the burner during combustion, and a highly concentrated slurry can be stably supplied.
さらに、従来燃焼後に多量に発生した灰分が
燃焼前に除去されるためボイラ設備を大型化す
る必要もなくまた多大の処理作業が省略され
る。 Furthermore, since the ash that conventionally occurs in large amounts after combustion is removed before combustion, there is no need to enlarge the boiler equipment and a large amount of processing work is omitted.
(3) 粗粉砕ミルで石炭を粗粉砕した低濃度スラリ
中に含まれる灰分を脱灰したのち脱水するの
で、脱水工程が円滑に効率良く行なわれる。(3) Since the ash contained in the low concentration slurry obtained by coarsely pulverizing coal in a coarse pulverizing mill is deashed and then dehydrated, the dehydration process is carried out smoothly and efficiently.
(4) 石炭を粗粉砕ミルで粗粉砕したのち、スラリ
調整槽から得られる調整高濃度脱灰スラリ中の
石炭粒を超微粉砕ミルで摩砕するので、石炭粒
は丸味を帯びる。したがつて、添加剤の分散が
良好となり、その結果微小及び超微小石炭粒が
石炭粒間に充填され石炭濃度が高くて、しかも
灰分の少ない粘度の低い均質な製品高濃度脱灰
スラリを得ることが出来る。(4) After coarsely pulverizing the coal with a coarse pulverizing mill, the coal particles in the adjusted high concentration deashing slurry obtained from the slurry adjusting tank are ground with an ultra-fine pulverizing mill, so that the coal particles have a rounded appearance. Therefore, the additives are well dispersed, and as a result, fine and ultra-fine coal grains are packed between the coal grains, creating a highly concentrated demineralized slurry with a high coal concentration, low ash content, and low viscosity. You can get it.
(5) 石炭を粗粉砕ミルで粗粉砕したのち、スラリ
調整槽から得られる調整高濃度脱灰スラリ中の
石炭粒を超微粉砕ミルで摩砕するとともにさら
に超微小粒化するので、製品として出て来る製
品高濃度脱灰スラリには粒径40〜数μの微小石
炭粒および粒径数μ以下の超微小石炭粒が多量
に含まれるのでレオロジー特性が擬塑性となり
きわめて貯蔵安定性が向上する。(5) After coarsely pulverizing the coal in a coarse pulverizing mill, the coal grains in the adjusted highly concentrated demineralized slurry obtained from the slurry adjustment tank are ground in an ultra-fine pulverizing mill and further made into ultra-fine particles, so that the product is The resulting high-concentration demineralized slurry contains a large amount of microscopic coal particles with a particle size of 40 to several microns and ultrafine coal particles with a particle size of several microns or less, so the rheological properties become pseudoplastic and extremely storage stable. improves.
(6) スラリ調整槽で混合撹拌して調整された灰分
の少ない粘度の低い均一性のある良質の調整高
濃度脱灰スラリの１部を返送調整高濃度脱灰ス
ラリの返送循環ラインから超微粉砕ミルに供給
し、この超微粉砕ミルで返送調整高濃度脱灰ス
ラリの石炭粒を再度摩砕しながら超微粉砕して
丸味のある超微小粒含有脱灰スラリを作つて返
送循環ラインからスラリ調整槽に返送するの
で、スラリ調整槽では常に均一性のある良質の
超微小粒含有脱灰スラリが供給されながら混合
撹拌される。したがつて、スラリ調整槽からの
調整高濃度脱灰スラリすなわち製品高濃度脱灰
スラリは常に均一のものとなり、製品としてボ
イラ等の燃焼手段等に供給された場合、安定し
た燃焼状態を得るこことが出来る。(6) A portion of the high-quality adjusted high-concentration deashing slurry with low ash content, low viscosity, and low uniformity adjusted by mixing and stirring in the slurry adjustment tank is returned to the ultra-fine level from the return circulation line of the adjusted high-concentration deashing slurry. The coal grains in the highly concentrated demineralized slurry are fed to a pulverizing mill, and the coal grains in the highly concentrated demineralized slurry are ground again in this ultra-fine pulverizer mill and ultra-finely pulverized to create a roundish demineralized slurry containing ultra-fine particles, which is sent back from the circulation line. Since the slurry is returned to the slurry adjustment tank, the slurry adjustment tank is constantly supplied with a uniform, high-quality demineralized slurry containing ultrafine particles while being mixed and stirred. Therefore, the adjusted high-concentration demineralized slurry from the slurry adjustment tank, that is, the product high-concentration demineralized slurry, is always uniform, and when it is supplied as a product to combustion means such as a boiler, stable combustion conditions can be achieved. I can do that.
(7) 石炭を粗粉砕ミルで粗粉砕したものを脱灰し
たのち脱水するので、脱水機の脱水性能が著し
く向上し、また脱灰脱水ケーキ中の水分が減少
するので、その後の高濃度脱灰スラリの水分を
低目におさえることが出来る。また、水分の調
整濃度を広い範囲で選ぶことが出来る。(7) Coal is coarsely pulverized in a coarse pulverizing mill, deashed and then dehydrated, so the dehydration performance of the dehydrator is significantly improved, and the water content in the deashed and dehydrated cake is reduced, making it possible to perform subsequent high-concentration dehydration. The moisture content of the ash slurry can be kept low. Further, the adjusted concentration of water can be selected from a wide range.
次に、本発明の第２発明は、上記第１発明をさ
らに改良するために提出されたものである。 Next, a second invention of the present invention has been submitted to further improve the first invention.
すなわち、本発明の第２発明は、石炭を水中で
粗粉砕ミルによつて粗粉砕して低濃度スラリを作
り、ついで上記低濃度スラリを脱灰したのち脱水
し、得られる脱灰脱水ケーキを塊砕装置又はトル
ク均等型塊砕装置で塊砕し、小塊状脱灰脱水ケー
キとして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、添加剤及び上記小塊状脱灰脱
水ケーキを返送されてくる返送超微小粒含有脱灰
スラリとともに混合撹拌しながら調整し、ついで
上記スラリ調整槽で得られる調整高濃度脱灰スラ
リを製品として供給しかつ上記調整高濃度脱灰ス
ラリの１部を超微粉砕ミルに導き、同超微粉砕ミ
ルで上記調整高濃度脱灰スラリに石炭粒を超微粉
砕して超微小粒含有脱灰スラリとしたのち上記ス
ラリ調整槽に返送循環させることを特徴とする高
濃度スラリの製造方法である。 That is, the second aspect of the present invention is to coarsely crush coal in water using a coarse crushing mill to create a low concentration slurry, then demineralize and dehydrate the low concentration slurry, and obtain a deashed and dehydrated cake. It is crushed with a lump crusher or a torque equalization type lump crusher and introduced into a slurry adjustment tank as a small lump demineralized dehydrated cake, and the adjusted water, additives and the above small lump demineralized dehydrated cake supplied in the slurry adjustment tank are It is mixed and stirred together with the returned demineralized slurry containing ultrafine particles, and then the adjusted high concentration demineralized slurry obtained in the slurry adjustment tank is supplied as a product, and a portion of the adjusted high concentration demineralized slurry is is introduced into an ultra-fine grinding mill, and the ultra-fine grinding mill ultrafinely grinds coal grains into the adjusted high-concentration demineralized slurry to form a demineralized slurry containing ultrafine particles, which is then returned to the slurry adjustment tank for circulation. This is a unique method for producing highly concentrated slurry.
このような構成で、第２発明の特徴は第１発明
において、脱水機から得られる脱灰脱水ケーキを
スラリ調整槽に導く前に塊砕装置又はトルク均等
型塊砕装置で微小な脱灰脱水ケーキに塊砕するこ
とにある。 With such a configuration, the feature of the second invention is that in the first invention, the deashing and dewatering cake obtained from the dewatering machine is subjected to minute deashing and dewatering using the agglomeration device or the torque equalization type agglomeration device before leading it to the slurry adjustment tank. The purpose is to crush the cake into chunks.
以下、本発明の第２発明の好ましい実施例を第
３図に図示する実施例で詳述する。 Hereinafter, a preferred embodiment of the second aspect of the present invention will be described in detail with reference to the embodiment illustrated in FIG.
第３図に図示する実施例は、第２発明に係る実
施例のフローシイートである。 The embodiment illustrated in FIG. 3 is a flow sheet of the embodiment according to the second invention.
第３図に図示する実施例において、符号１乃至
２６は第１図に図示する実施例における符号１乃
至２６と均等物であるので説明を省略する。そし
て、３１は塊砕装置又はトルク均等型塊砕装置で
あり、この塊砕装置３１でライン１２を介して供
給される板状又は塊状の脱灰脱水ケーキを小塊状
又は微小塊状に塊砕するものである。３２はこの
小塊状又は微小塊状の脱灰脱水ケーキ（以下小塊
状脱灰脱水ケーキと記す）を輸送するラインであ
る。 In the embodiment shown in FIG. 3, reference numerals 1 to 26 are equivalent to reference numerals 1 to 26 in the embodiment shown in FIG. 1, so their explanation will be omitted. Reference numeral 31 denotes a crushing device or a torque equalization type crushing device, and this crushing device 31 crushes the plate-shaped or lump-shaped demineralized dehydrated cake supplied via the line 12 into small lumps or minute lumps. It is something. Reference numeral 32 denotes a line for transporting the demineralized and dehydrated cake in the form of small or minute lumps (hereinafter referred to as the demineralized and dehydrated cake in the form of small lumps).
第３図に図示するこのような実施例は、第１図
に図示する実施例の場合において、脱水機１０で
得られる脱灰脱水ケーキをライン１２を介して塊
砕装置又はトルク均等型塊砕装置３１に供給し、
板状又は塊状の脱灰脱水ケーキを小塊状又は微小
塊状に塊砕して小塊状脱灰脱水ケーキとし、これ
を小塊状脱灰脱水ケーキライン３２を介してスラ
リ調整槽１３に供給する点に特徴がある。 Such an embodiment illustrated in FIG. 3 is different from the embodiment illustrated in FIG. supplying the device 31;
A plate-shaped or lump-like demineralized dehydrated cake is crushed into small lumps or minute lumps to form a small lump-shaped demineralized dehydrated cake, and this is supplied to the slurry adjustment tank 13 via the small lump-shaped demineralized dehydrated cake line 32. It has characteristics.
なお、この場合も第２図にて図示するように、
超微粉砕ミル２に超微粉砕ミル調整水、超微粉砕
ミル添加剤を供給して適正な水分濃度、粘度等を
調整しても良い。以下、第３発明乃至第６発明に
係る各実施例においても同様である。 In this case as well, as shown in FIG.
The ultrafine grinding mill 2 may be supplied with ultrafine grinding mill adjustment water and ultrafine grinding mill additives to adjust appropriate water concentration, viscosity, etc. The same applies to each of the embodiments according to the third to sixth inventions.
以上、第２発明に係る実施例を示す第３図のフ
ローシイートに基づいて詳述したように、第２発
明は、第１発明で得られる上記(1)乃至(7)に記載の
他に次のような効果が得られる。 As described above in detail based on the flow sheet of FIG. 3 showing the embodiment of the second invention, the second invention provides the following in addition to the above (1) to (7) obtained in the first invention. You can get an effect like this.
(8) スラリ調整槽に供給する脱灰脱水ケーキを小
塊状に塊砕して供給するために、スラリ調整槽
に供給されるスラリ調整のための調整水、添加
剤及び返送超微小粒含有脱灰スラリとの均一な
混合撹拌及び調整がスムーズに行き良質で均一
な製品高濃度脱灰スラリを得ることが出来る。(8) In order to supply the demineralized and dewatered cake to the slurry adjustment tank by crushing it into small pieces, the adjusted water, additives, and returned ultrafine particle-containing demineralizer are supplied to the slurry adjustment tank. Uniform mixing and stirring with the ash slurry and adjustment can be carried out smoothly, and it is possible to obtain a high-quality, uniform product with high concentration deashing slurry.
(9) また、均一混合がスムーズに出来るので、製
品高濃度脱灰スラリの単位時間当りの生産量が
著しく多くなり、したがつて生産性が向上す
る。(9) Furthermore, since homogeneous mixing can be performed smoothly, the production amount of high-concentration demineralized slurry product per unit time is significantly increased, and productivity is therefore improved.
(10) トルク均等型塊砕装置を用いた場合にはモー
タにかかるトルクが均等になりモータのオーバ
ヒートも防止でき小容量のモータで塊砕作業が
スムーズに行く。このように塊砕作業が非常に
スムーズに行くので、大量の製品高濃度脱灰ス
ラリをスムーズに作ることが出来る。(10) When a torque-equalizing crusher is used, the torque applied to the motor becomes even, preventing overheating of the motor, and the crushing work can be carried out smoothly with a small-capacity motor. Since the agglomeration work is carried out very smoothly in this way, a large amount of highly concentrated product demineralized slurry can be produced smoothly.
次に、本発明の第３発明は上記第１発明をさら
に改良するために提供されたものである。 Next, a third invention of the present invention is provided to further improve the first invention.
すなわち、本発明の第３発明は、石炭を水中で
粗粉砕ミルによつて粗粉砕して低濃度スラリを作
り、ついで上記低濃度スラリを分級器にて粗粒を
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
粒カツト低濃度スラリと記す）とに分級し、上記
粗粒カツト低濃度スラリは脱灰したのち脱水し、
得られる粗粒カツト脱灰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、
添加剤及び上記粗粒カツト脱灰脱水ケーキを返送
されてくる返送超微小粒含有脱灰スラリとともに
混合撹拌しながら調整し、ついで上記スラリ調整
槽で得られる調整高濃度脱灰スラリを製品として
供給しかつ上記調整高濃度脱灰スラリの１部を超
微粉砕ミルに導き、同超微粉砕ミルで上記調整高
濃度脱灰スラリの石炭粒を超微粉砕して超微小粒
含有脱灰スラリとしたのち上記スラリ調整槽に返
送循環させることを特徴とする高濃度スラリの製
造方法である。 That is, in the third aspect of the present invention, coal is coarsely pulverized in water using a coarse pulverizing mill to create a low concentration slurry, and then the low concentration slurry is processed into a low concentration slurry (hereinafter referred to as coarse) containing coarse particles using a classifier. The slurry is classified into a low concentration slurry containing coarse particles (hereinafter referred to as a coarse cut low concentration slurry) and a low concentration slurry from which coarse particles have been removed (hereinafter referred to as a coarse cut low concentration slurry), and the coarse cut low concentration slurry is deashed and then dehydrated.
The resulting coarse cut demineralized and dehydrated cake is led to a slurry adjustment tank, and the adjusted water supplied from the slurry adjustment tank is
Additives and the coarse cut demineralized dehydrated cake are mixed and stirred together with the returned demineralized slurry containing ultrafine particles, and then the adjusted highly concentrated demineralized slurry obtained in the slurry adjustment tank is supplied as a product. In addition, a part of the adjusted high concentration demineralized slurry is introduced into an ultra-fine grinding mill, and the coal particles in the adjusted high-concentration demineralized slurry are ultra-finely pulverized in the ultra-fine grinding mill to obtain a demineralized slurry containing ultrafine particles. This method of producing a high concentration slurry is characterized in that the slurry is then returned and circulated to the slurry adjustment tank.
このような構成で第３発明の特徴は第１発明に
おいて、粗粉砕ミルから得られる低濃度スラリを
脱灰装置に導く前に分級器で粗粒含有低濃度スラ
リと粗粒カツト低濃度スラリとに分級し、粗粒カ
ツト低濃度スラリのみを脱灰装置に導くことにあ
る。 With such a configuration, the feature of the third invention is that in the first invention, before the low concentration slurry obtained from the coarse grinding mill is led to the deashing device, it is separated into a coarse grain-containing low concentration slurry and a coarse grain cut low concentration slurry in a classifier. The purpose is to classify only the coarse cut slurry with low concentration into the deashing equipment.
以下、本発明の第３発明の好ましい実施例を第
４図及び第５図に図示する実施例で詳述する。 Hereinafter, a preferred embodiment of the third aspect of the present invention will be described in detail with reference to the embodiment illustrated in FIGS. 4 and 5.
第４図及び第５図に図示する実施例は、第３発
明に係る第１実施例及び第２実施例のフローシイ
ートである。 The embodiments illustrated in FIGS. 4 and 5 are flow sheets of the first embodiment and the second embodiment according to the third invention.
第４図及び第５図に図示する実施例において、
符号１乃至２６のうち同符号のものは第１図に図
示する実施例における符号１乃至２６のうち同符
号のものと均等物であるので説明を省略する。そ
して、９ａは粗粒カツト低濃度脱灰スラリの輸送
ライン、１２ａは粗粒カツト脱灰脱水ケーキの輸
送ライン、３３はライン６から供給されてきた低
濃度スラリ中の粗粒を分離し粗粒含有低濃度スラ
リと粗粒カツト低濃度スラリとに分級する分級
器、３４は分級器３３で分級された粗粒含有低濃
度スラリの排出ライン、３５は分級器３３で分級
された粗粒カツト低濃度スラリの輸送ラインであ
る。 In the embodiment illustrated in FIGS. 4 and 5,
The same reference numerals among the reference numerals 1 to 26 are equivalent to the same reference numerals among the reference numerals 1 to 26 in the embodiment shown in FIG. 1, and therefore their explanation will be omitted. Reference numeral 9a is a transport line for the coarse cut and low concentration demineralized slurry, 12a is a transport line for the coarse cut and demineralized cake, and 33 is a line for separating the coarse particles in the low concentration slurry supplied from line 6. A classifier for classifying the low concentration slurry containing coarse particles and coarse cut low concentration slurry; 34 is a discharge line for the low concentration slurry containing coarse particles classified by the classifier 33; 35 is a line for discharging the low concentration slurry containing coarse particles classified by the classifier 33; This is a transportation line for concentrated slurry.
第４図に図示するこのような実施例は、第１図
に図示する実施例の場合において、粗粉砕ミル５
で得られる低濃度スラリをライン６によつて分級
器３３に供給して粗粒含有低濃度スラリと粗粒カ
ツト低濃度スラリとに分級し、粗粒カツト低濃度
スラリのみをライン３５から脱灰装置７に供給す
る点に特徴がある。 Such an embodiment as shown in FIG. 4 is similar to the embodiment shown in FIG.
The low-concentration slurry obtained is supplied to the classifier 33 through line 6 and classified into low-concentration slurry containing coarse particles and coarse-cut low-concentration slurry, and only the coarse-cut low-concentration slurry is deashed through line 35. It is characterized in that it is supplied to the device 7.
以上、第３発明に係る第１実施例を示す第４図
のフローシイートに基づいて詳述したように第３
発明は、第１発明で得られる上記(1)乃至(7)に記載
の効果の他に次のような効果が得られる。 As described above in detail based on the flow sheet of FIG. 4 showing the first embodiment according to the third invention,
The invention provides the following effects in addition to the effects described in (1) to (7) above obtained with the first invention.
(11) 分級器で分級し、粗粒カツト低濃度脱灰スラ
リのみを製品の製造ラインに供給するので、製
品高濃度脱灰スラリ中には粗粒が非常に少なく
なり微小又は超微小石炭粒が増大することによ
り製品高濃度脱灰スラリのレオロジー特性が擬
塑性となり貯蔵安定性が向上する。(11) Since only coarse grain cut low concentration demineralized slurry is supplied to the product manufacturing line after being classified with a classifier, there are very few coarse grains in the product high concentration demineralized slurry, resulting in fine or ultrafine coal. As the grain size increases, the rheological properties of the high-concentration demineralized slurry become pseudoplastic, improving storage stability.
(12) 分級器で分級するので製品高濃度脱灰スラリ
中の粗粒の最大径を任意に選ぶことが出来る。
したがつて、所望の粒度分布の製品高濃度脱灰
スラリを得ることが容易になる。(12) Since classification is performed using a classifier, the maximum diameter of the coarse particles in the high-concentration demineralized slurry can be arbitrarily selected.
Therefore, it becomes easy to obtain a highly concentrated product demineralized slurry with a desired particle size distribution.
(13) 分級器で分級し、粗粒カツト低濃度脱灰スラ
リのみを製品の製造ラインに供給するので、製
品高濃度脱灰スラリ中の粗粒が非常に少なくな
る。したがつて、ボイラ等の燃焼手段で燃焼さ
せた場合に、未然炭分が極めて少なくなりボイ
ラ内の残滓も殆んどなくなつて、しかも燃焼効
率が良くなる。(13) Since the product is classified using a classifier and only the coarse cut, low-concentration demineralized slurry is supplied to the product production line, the amount of coarse particles in the product high-concentration demineralized slurry is extremely small. Therefore, when the coal is burned in a combustion means such as a boiler, the amount of unused coal is extremely reduced, there is almost no residue in the boiler, and the combustion efficiency is improved.
また、第５図は第３発明の第２実施例であり、
分級器３３で得られる粗粒含有低濃度スラリを粗
粒含有低濃度スラリの返送循環ライン３４ａを介
して粗粉砕ミル５に返送し、含有されている粗粒
をさらに粗粉砕ミル５で細小又は微小石炭粒に粉
砕するものである。 Further, FIG. 5 shows a second embodiment of the third invention,
The coarse grain-containing low-concentration slurry obtained in the classifier 33 is returned to the coarse grinding mill 5 via the coarse grain-containing low-concentration slurry return circulation line 34a, and the contained coarse particles are further processed into fine or It is used to crush coal into minute coal particles.
このように、第５図に図示する第３発明の第２
実施例では次の効果がさらに得られる。 In this way, the second aspect of the third invention illustrated in FIG.
In the embodiment, the following effects can be further obtained.
粗粒含有低濃度スラリを再度粗粉砕ミル５で
粗粉砕するので、製品高濃度脱灰スラリ中には
粗粒がさらに非常に少さくなり、一方微小及び
超微小石炭粒が増大することにより製品高濃度
脱灰スラリのレオロジー特性が非常に擬塑性と
なり貯蔵安定性が向上する。 Since the coarse particle-containing low concentration slurry is coarsely crushed again by the coarse grinding mill 5, the coarse particles in the product high concentration demineralized slurry are further reduced to a very small amount, while the fine and ultra-fine coal particles increase. The rheological properties of the high-concentration demineralized slurry become extremely pseudoplastic, improving storage stability.
分級器３３で分級し粗粒含有低濃度スラリは
再度粗粉砕ミル５で粉砕するので、製品高濃度
脱灰スラリ中の粗粒の最大径をきわめて任意に
選ぶことが出来る。したがつて、所望の粒度分
布の製品高濃度脱灰スラリを得ることがきわめ
て容易になる。 Since the low concentration slurry containing coarse particles is classified by the classifier 33 and is crushed again by the coarse grinding mill 5, the maximum diameter of the coarse particles in the product high concentration demineralized slurry can be selected very arbitrarily. Therefore, it becomes extremely easy to obtain a highly concentrated product demineralized slurry with a desired particle size distribution.
分級器３３で分級し粗粒含有低濃度スラリは
再度粗粉砕ミルで５で粉砕するので、製品高濃
度脱灰スラリ中の粗粒が非常に少なくなる。し
たがつて、ボイラ等の燃焼手段で燃焼させた場
合に、未燃炭分がさらに極めて少なくなりボイ
ラ内の残滓もきわめて少なくなり、しかも燃焼
効率がさらに良くなる。 Since the coarse particle-containing low concentration slurry that has been classified by the classifier 33 is crushed again in the coarse grinding mill 5, the coarse particles in the product high concentration demineralized slurry are extremely reduced. Therefore, when the coal is combusted in a combustion means such as a boiler, the amount of unburned coal is significantly reduced, the amount of residue in the boiler is also significantly reduced, and the combustion efficiency is further improved.
次に、本発明の第４発発明は、本発明の第２発
明及び第３発明が有する効果の相乗効果をねらつ
てさらに良質の製品高濃度スラリを得る目的で提
供されたものである。 Next, the fourth invention of the present invention is provided for the purpose of obtaining a high-concentration slurry of higher quality by aiming at a synergistic effect of the effects of the second and third inventions of the present invention.
すなわち、本発明の第４発明は、石炭を水中で
粗粉砕ミルによつて粗粉砕して低濃度スラリを作
り、ついで上記低濃度スラリを分級器にて粗粒含
有低濃度スラリと粗粒カツト低濃度スラリとに分
級し、上記粗粒カツト低濃度スラリは脱灰したの
ち脱水し、得られる粗粒カツト脱灰脱水ケーキを
塊砕砕装置又はトルク均等型塊砕装置で塊砕し、
小塊状脱灰脱水ケーキとしてスラリ調整槽に導
き、同スラリ調整槽で供給される調整水、添加剤
および上記小塊状粗粒カツト脱灰脱水ケーキを返
送させてくる返送超微小粒含有脱灰スラリととも
に混合撹拌しながら調整し、ついで上記スラリ調
整槽で得られる調整高濃度脱灰スラリを製品とし
て供給し、かつ上記調整高濃度脱灰スラリの１部
を超微粉砕ミルに導き、同超微粉砕ミルで上記調
整高濃度脱灰スラリの石炭粒を超微粉砕して超微
小粒含有脱灰スラリとしたのち上記スラリ調整槽
に返送循環させることを特徴とする高濃度スラリ
の製造方法である。 That is, in the fourth aspect of the present invention, coal is coarsely pulverized in water using a coarse pulverizing mill to create a low concentration slurry, and then the low concentration slurry is separated into a coarse grain-containing low concentration slurry and coarse grain cuts using a classifier. The coarse cut cut and low concentration slurry are deashed and then dehydrated, and the resulting coarse cut cut deashed and dehydrated cake is crushed using a lump crusher or a torque equalization type lump crusher,
The returned demineralized slurry containing ultrafine particles is introduced as a small block demineralized dehydrated cake into a slurry adjustment tank, and the adjusted water, additives, and the above-mentioned small block coarse cut demineralized cake are returned to the slurry adjustment tank. Then, the adjusted high concentration demineralized slurry obtained in the slurry adjustment tank is supplied as a product, and a part of the adjusted high concentration demineralized slurry is led to an ultra-fine grinding mill, and the same ultra-fine slurry is A method for producing a high-concentration slurry, which comprises ultrafinely pulverizing the coal particles in the adjusted high-concentration demineralized slurry in a crushing mill to obtain a demineralized slurry containing ultrafine particles, which is then returned and circulated to the slurry adjustment tank. .
このような構成で、第４発明の特徴は第２発明
および第３発明において、粗粉砕ミルから得られ
る低濃度スラリを脱灰装置に導く前に分級器で粗
粒含有低濃度スラリと粗粒カツト低濃度スラリと
に分級し、粗粒カツト低濃度スラリのみを脱灰装
置に導いたのち脱水機に導くことと、脱水機から
得られる粗粒カツト脱灰脱水ケーキをスラリ調整
槽に導く前に塊砕装置又はトルク均等型塊砕装置
で微小な脱灰脱水ケーキに塊砕することとにあ
る。 With such a configuration, the feature of the fourth invention is that in the second and third inventions, before the low concentration slurry obtained from the coarse grinding mill is led to the deashing device, the low concentration slurry containing coarse particles and the coarse grains are separated in a classifier. The coarse cuts and low concentration slurry are separated into a slurry, and only the coarse cuts and low concentration slurry are led to a deashing device and then to a dehydrator. The second step is to crush it into fine demineralized and dehydrated cakes using a crusher or a torque-equalizing crusher.
以下、本発明の第４発明の好ましい実施例を第
６図及び第７図に図示する実施例で詳述する。 Hereinafter, a preferred embodiment of the fourth aspect of the present invention will be described in detail with reference to the embodiment illustrated in FIGS. 6 and 7.
第６図及び第７図に図示する実施例は、第４発
明に係る第１実施例及び第２実施例のフローシイ
ートである。 The embodiments illustrated in FIGS. 6 and 7 are flow sheets of the first embodiment and the second embodiment according to the fourth invention.
第６図及び第７図に図示する実施例において、
符号１乃至３５のうち同符号のものは第１図、第
３図、第４図および第５図に図示する実施例にお
ける符号１乃至３５のうちの同符号のものと均等
物であるので説明を昇略する。なお、９ａは粗粒
カツト低濃度脱灰スラリの輸送ライン、１２ａは
粗粒カツト脱灰脱水ケーキの輸送ライン、３２ａ
は小塊状粗粒カツト脱灰脱水ケーキの輸送ライン
である。 In the embodiment illustrated in FIGS. 6 and 7,
Items with the same reference numerals among reference numerals 1 to 35 are equivalent to those with the same reference numerals among the reference numerals 1 to 35 in the embodiments shown in FIGS. to be promoted. In addition, 9a is a transport line for coarse cut low concentration demineralized slurry, 12a is a transport line for coarse cut cut demineralized dehydrated cake, 32a
is a transportation line for small-sized coarse cut cut demineralized dehydrated cake.
第６図に図示するこのような実施例は、第３図
乃至第５図に図示する実施例の場合において、粗
粉砕ミル５で得られる低濃度スラリをライン６に
よつて分級器３３に供給して粗粒含有低濃度スラ
リと粗粒カツト低濃度スラリとに分級し、粗粒カ
ツト低濃度スラリのみをライン３５から脱灰装置
７に供給すること及び脱水機１０で得られる粗粒
カツト脱灰脱水ケーキはライン１２ａを介して塊
砕装置又はトルク均等型塊砕装置３１に供給し板
状又は塊状の脱灰脱水ケーキを小塊状又は微小塊
状に塊砕して小塊状脱灰脱水ケーキとし、これを
ライン３２ａを介してスラリ調整槽１３に供給す
る点に特徴がある。 In the embodiment shown in FIG. 6, in the case of the embodiments shown in FIGS. The coarse cut slurry is separated into a low concentration slurry containing coarse particles and a low concentration slurry containing coarse cut cuts, and only the coarse cut low concentration slurry is supplied to the deashing device 7 through the line 35, and the coarse cut cuts obtained in the dehydrator 10 are deashed. The dehydrated ash cake is supplied to the agglomeration device or the torque equalization type agglomeration device 31 through the line 12a, and the plate-like or lump-like deashing and dehydration cake is crushed into small lumps or minute lumps to form a small-sized deashing and dehydration cake. , is characterized in that it is supplied to the slurry adjustment tank 13 via the line 32a.
以上、第４発明に係る実施例を示す第６図のフ
ローシイートに基づいて詳述したように、第４発
明は第１発明乃至第３発明で得られる上記(1)乃至
(13)に記載の効果の他に次のような効果が得られ
る。 As described above in detail based on the flow sheet of FIG. 6 showing the embodiment of the fourth invention, the fourth invention is based on the above (1) to the above (1) obtained in the first to third inventions.
In addition to the effects described in (13), the following effects can be obtained.
(14) 脱灰、脱水する前に分級し、粗粒カツト低濃
度脱灰スラリのみを脱水し、さらに脱水後の板
状又は塊状の粗粒カツト脱灰脱水ケーキを塊砕
装置又はトルク均等型塊砕装置で小塊状に塊砕
してスラリ調整槽に供給するため、また、スラ
リ調整槽では常に超微粉砕ミルで超微粉砕され
かつ摩砕された超微小粒含有脱灰スラリが返送
されて来て一諸に調整されるのでこれらの相乗
効果によつて極めて良質な製品高濃度脱灰スラ
リを得ることが出来る。(14) Before deashing and dewatering, classify, dehydrate only the coarse cut cut low concentration demineralized slurry, and further dehydrate the plate-shaped or lumpy coarse cut cut demineralized dehydrated cake after dewatering by crushing device or torque equalization type. In order to crush the slurry into small pieces using the agglomeration device and supply it to the slurry adjustment tank, the slurry adjustment tank always returns the demineralized slurry containing ultrafine particles that has been ultrafinely pulverized and ground using an ultrafine grinding mill. The synergistic effects of these processes make it possible to obtain highly concentrated demineralized slurry of extremely high quality.
また、第７図は第４発明の第２実施例であ
り、第６図に図示する第４発明の第１実施例
に、上記第３発明の第２実施例を図示する第５
図のフローシイートで説明した構成、作用を付
加して、上記、、に記載した効果をねら
つたものである。 Further, FIG. 7 shows a second embodiment of the fourth invention, and a fifth embodiment showing the second embodiment of the third invention is added to the first embodiment of the fourth invention shown in FIG.
By adding the configuration and operation described in the flow sheet shown in the figure, the system aims to achieve the effects described in the above.
脱灰、脱水する前に分級し粗粒含有低濃度ス
ラリは粗粉砕ミル５へ返送して再度粉砕し、粗
粒カツト低濃度スラリのみを脱灰脱水し、さら
に脱水後の板状又は塊状の粗粒カツト脱灰脱水
ケーキを塊砕装置又はトルク均等型塊砕装置３
１で小塊状に塊砕してスラリ調整槽１３に供給
するため、また、スラリ調整槽１３では常に超
微粉砕ミル２３で超微粉砕されかつ摩砕された
超微小粒含有脱灰スラリが返送されて来て一諸
に調整されるのでこれらの相乗効果によつて極
めて良質な製品高濃度スラリを容易に得ること
が出来る。 Before deashing and dewatering, the low concentration slurry containing coarse particles is classified and sent back to the coarse grinding mill 5 to be crushed again.Only the coarse cut and low concentration slurry is deashed and dehydrated. Coarse grain cut demineralized dehydrated cake is crushed by crushing device or torque equalization type crushing device 3
In order to crush the slurry into small pieces in step 1 and supply it to the slurry adjustment tank 13, the slurry adjustment tank 13 always returns the demineralized slurry containing ultrafine particles that has been ultrafinely pulverized and ground in the ultrafine grinding mill 23. The synergistic effect of these processes makes it possible to easily obtain a highly concentrated product slurry of extremely high quality.
次に本発明の第５発明は、本発明の第３発明を
さらに改良したものである。 Next, the fifth invention of the present invention is a further improvement of the third invention of the present invention.
すなわち、本発明の第５発明は、石炭を水中で
粗粉砕ミルによつて粗粉砕して低濃度スラリを作
り、ついで上記低濃度スラリを希釈水にて希釈し
たのち分級器にて粗粒含有希釈低濃度スラリと粗
粒カツト希釈低濃度スラリとに分級し、上記粗粒
カツト希釈低濃度スラリは脱灰したのち脱水し、
得られる粗粒カツト脱灰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、
添加剤および上記粗粒カツト脱灰脱水ケーキを返
送されてくる返送超微小粒含有脱灰スラリととも
に混合撹拌しながら調整し、ついで上記スラリ調
整槽で得られる調整高濃度脱灰スラリを製品とし
て供給しかつ上記調整高濃度スラリの１部を超微
粉砕ミルに導き、同超微粉砕ミルで上記調整高濃
度脱灰スラリの石炭粒を超微粉砕して超微小粒含
有脱灰スラリとしたのち上記スラリ調整槽に返送
循環させることを特徴とする高濃度スラリの製造
方法である。 That is, the fifth invention of the present invention is to create a low concentration slurry by coarsely crushing coal in water using a coarse crushing mill, and then dilute the low concentration slurry with dilution water, and then use a classifier to remove coarse particles. Classified into diluted low concentration slurry and coarse cut diluted low concentration slurry, the coarse cut diluted low concentration slurry is deashed and then dehydrated.
The resulting coarse cut demineralized and dehydrated cake is led to a slurry adjustment tank, and the adjusted water supplied from the slurry adjustment tank is
Additives and the coarse cut demineralized dehydrated cake are mixed and stirred together with the returned demineralized slurry containing ultrafine particles, and then the adjusted highly concentrated demineralized slurry obtained in the slurry adjustment tank is supplied as a product. In addition, a part of the adjusted high concentration slurry is introduced into an ultra-fine grinding mill, and the coal particles in the adjusted high-concentration demineralized slurry are ultra-finely pulverized in the ultra-fine grinding mill to obtain a demineralized slurry containing ultra-fine particles. This is a method for producing a highly concentrated slurry, characterized in that the slurry is returned and circulated to the slurry adjustment tank.
このような構成で、第５発明の特徴は第３発明
において、粗粉砕ミルから得られる低濃度スラリ
を分級器に導く前に希釈水にて希釈したのちこの
希釈低濃度スラリを分級器に導くことにある。 With such a configuration, the feature of the fifth invention is that in the third invention, the low concentration slurry obtained from the coarse grinding mill is diluted with dilution water before being led to the classifier, and then this diluted low concentration slurry is led to the classifier. There is a particular thing.
以下、本発明の第５発明の好ましい実施例を第
８図及び第９図に図示する実施例で詳述する。 Hereinafter, a preferred embodiment of the fifth aspect of the present invention will be described in detail with reference to the embodiment illustrated in FIGS. 8 and 9.
第８図及び第９図に図示する実施例は、第５発
明に係る第１実施例及び第２実施例のフローシイ
ートである。 The embodiments illustrated in FIGS. 8 and 9 are flow sheets of the first embodiment and the second embodiment according to the fifth invention.
第８図及び第９図に図示する実施例において、
符号１乃至３５のうち同符号のものは第４図およ
び第５図に図示す実施例における符号１乃至３５
のうち同符号のものと均等物であるので説明を省
略する。そして、９ｂは粗粒カツト希釈低濃度脱
灰スラリの輸送ライン、１２ａは粗粒カツト脱灰
脱水ケーキの輸送ライン、３４ｂは粗粒含有希釈
低濃度スラリの排出ライン、３５ａは粗粒カツト
希釈低濃度スラリの輸送ライン、３６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
分級しやすい濃度まで薄める希釈用タンク、３７
は希釈水用のタンク、３８は希釈水タンク３７の
希釈水を供給する希釈水の供給ライン、３９は希
釈用タンク３６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。 In the embodiment illustrated in FIGS. 8 and 9,
Among the reference numerals 1 to 35, the same reference numerals are 1 to 35 in the embodiment shown in FIGS. 4 and 5.
Since these are equivalent to those with the same reference numerals, their explanation will be omitted. 9b is a transport line for the coarse cut diluted low concentration demineralized slurry, 12a is a transport line for the coarse cut deashed dehydrated cake, 34b is a discharge line for the diluted low concentration slurry containing coarse grains, and 35a is the coarse cut diluted low concentration slurry. Transport line for concentrated slurry, 36 is line 6
A dilution tank, 37, which dilutes the low concentration slurry supplied through the dilution water to a concentration that is easy to classify.
is a tank for dilution water, 38 is a dilution water supply line that supplies dilution water from the dilution water tank 37, and 39 is coal 15-40 obtained by diluting in the dilution tank 36.
% by weight, low concentration slurry of 60-85% by weight of water (hereinafter referred to as
This line transports diluted low concentration slurry).
第８図に図示するこのような実施例は、第４図
に図示する実施例の場合において、粗粉砕ミル５
で得られる低濃度スラリをライン６によつて希釈
用タンク３６に導き、この希釈用タンク３６でタ
ンク３７からライン３８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
希釈低濃度スラリをライン３９によつて分級器３
３に供給して粗粒含有希釈濃度スラリと粗粒カツ
ト希釈低濃度スラリに分級する。そして、この粗
粒カツト希釈低濃度スラリをライン３５ａから脱
灰装置７に供給する点に特徴がある。 Such an embodiment as illustrated in FIG.
The low concentration slurry obtained is led to a dilution tank 36 through a line 6, and is diluted in this dilution tank 36 with dilution water supplied from a tank 37 through a line 38 to a concentration that is easy to classify. That is, it is made into a diluted low concentration slurry containing 15 to 40% by weight of coal. This diluted low concentration slurry is passed through line 39 to classifier 3.
3 and classified into a diluted slurry containing coarse particles and a diluted low concentration slurry containing coarse particles. A feature is that this coarse cut diluted low concentration slurry is supplied to the deashing device 7 from the line 35a.
また、第９図は第５発明の第２実施例であり、
分級器３３で得られる粗粒含有希釈低濃度スラリ
を粗粒含有希釈低濃度スラリの返送循環ライン３
４ｃを介して粗粉砕ミル５に返送し、含有されて
いる粗粒をさらに粗粉砕ミル５で細小又は微小石
炭粒に粉砕するものである。 Further, FIG. 9 shows a second embodiment of the fifth invention,
Return circulation line 3 for the diluted low concentration slurry containing coarse particles obtained in the classifier 33
4c, and the contained coarse particles are further ground into fine or fine coal particles by the coarse grinding mill 5.
以上、第５発明に係る実施例を示す第８図及び
第９図のフローシイートに基づいて詳述したよう
に、第５発明は第１発明及び第３発明で得られる
上記(1)乃至(13)に記載の効果の他に次のような効果
が得られる。 As described above in detail based on the flow sheets of FIGS. 8 and 9 showing the embodiments of the fifth invention, the fifth invention is the above (1) to (13) obtained in the first invention and the third invention. In addition to the effects described in ), the following effects can be obtained.
(15) 分級器で分級する前に石炭20〜60重量％の低
濃度スラリを希釈して石炭15〜40重量％の薄い
希釈低濃度スラリにするので、分級器での分級
能率が向上し、製品高濃度スラリの大量生産が
可能である。(15) Before classification with a classifier, the low concentration slurry of 20 to 60% by weight of coal is diluted to a thin diluted low concentration slurry of 15 to 40% by weight of coal, so the classification efficiency in the classifier is improved. Mass production of highly concentrated product slurry is possible.
次に、本発明の第６発明は上記第１発明乃至第
５発明をさらに改良したものである。 Next, the sixth invention of the present invention is a further improvement of the first to fifth inventions.
すなわち、本発明の第６発明は、石炭を水中で
粗粉砕ミルによつて粗粉砕して低濃度スラリを作
り、ついで上記低濃度スラリを希釈水にて希釈し
たのち分級器にて粗粒含有希釈低濃度スラリと粗
粒カツト希釈低濃度スラリとに分級し、上記粗粒
カツト希釈低濃度スラリは脱灰したのち脱水し、
得られる粗粒カツト脱灰脱水ケーキを塊砕装置又
はトルク均等型塊砕装置で塊砕し小塊状粗粒カツ
ト脱灰脱水ケーキとして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、添加剤及び上
記小塊状粗粒カツト脱灰脱水ケーキを返送されて
くる返送超微小粒含有脱灰スラリとともに混合撹
拌しながら調整し、ついで上記スラリ調整槽で得
られる調整高濃度脱灰スラリを製品として供給し
かつ上記調整高濃度脱灰スラリの１部を超微粉砕
ミルに導き、同超微粉砕ミルで上記調整高濃度脱
灰スラリの石炭粒を超微粉砕して超微小粒含有脱
灰スラリとしたのち上記スラリ調整槽に返送循環
させることを特徴とする高濃度スラリの製造方法
である。 That is, in the sixth aspect of the present invention, coal is coarsely pulverized in water using a coarse pulverizing mill to create a low concentration slurry, and then the low concentration slurry is diluted with dilution water, and then a classifier is used to remove coarse particles. Classified into diluted low concentration slurry and coarse cut diluted low concentration slurry, the coarse cut diluted low concentration slurry is deashed and then dehydrated.
The obtained coarse cut demineralized and dehydrated cake is crushed in a lump crusher or a torque equalization type agglomerator, and is led to a slurry adjustment tank as a small-sized coarse cut demineralized and dehydrated cake, and adjusted water is supplied from the slurry adjustment tank. , the additives and the above-mentioned small-sized coarse-grain cut demineralization-dewatering cake are mixed and adjusted with the returned demineralization slurry containing ultra-fine particles, and then the adjusted high-concentration demineralization slurry obtained in the slurry adjustment tank is adjusted. A part of the adjusted highly concentrated demineralized slurry is supplied as a product and introduced into an ultra-fine grinding mill, and the coal particles in the adjusted highly concentrated demineralized slurry are ultra-finely pulverized in the same ultra-fine grinder to remove ultrafine particles. This is a method for producing a highly concentrated slurry, which is characterized in that the ash slurry is made into an ash slurry and then returned and circulated to the slurry adjustment tank.
このような構成で、第６発明の特徴は第５発明
において、脱水機から得られる粗粒カツト脱灰脱
水ケーキをスラリ調整槽に導く前に塊砕装置又は
トルク均等型塊砕装置で微小な脱灰脱水ケーキに
塊砕することにある。 With such a configuration, the feature of the sixth invention is that in the fifth invention, the coarse cut, deashed, and dewatered cake obtained from the dewatering machine is crushed into fine particles using a crushing device or a torque equalization type crushing device before being led to the slurry adjustment tank. The process consists of decalcification and crushing into dehydrated cakes.
以下、本発明の第６発明の好ましい実施例を第
１０図及び第１１図に図示する実施例で詳述す
る。 Hereinafter, a preferred embodiment of the sixth aspect of the present invention will be described in detail with reference to the embodiment illustrated in FIGS. 10 and 11.
第１０図及び第１１図に図示する実施例は、第
６発明に係る第１実施例及び第２実施例のフロー
シイートである。 The embodiments illustrated in FIGS. 10 and 11 are flow sheets of the first embodiment and the second embodiment according to the sixth invention.
第１０図及び第１１図に図示する実施例におい
て、符号１乃至３９のうち同符号のもの及び符号
９ａ，９ｂ，１２ａ，３４ｂ，３４ｃ，３５ａは
第１図、第３図乃至第９図に図示する実施例にお
ける符号１乃至３９のうち同符号のもの及び符号
９ａ，９ｂ，１２ａ，３４ｂ，３４ｃ，３５ａと
均等物であるので説明を省略する。そして、３２
ａは小塊状粗粒カツト脱灰脱水ケーキの輸送ライ
ンである。 In the embodiment shown in FIG. 10 and FIG. 11, those with the same reference numerals 1 to 39 and 9a, 9b, 12a, 34b, 34c, and 35a are shown in FIGS. 1 and 3 to 9. Since they are equivalent to the same symbols 1 to 39 and the symbols 9a, 9b, 12a, 34b, 34c, and 35a in the illustrated embodiment, the explanation will be omitted. And 32
a is a transportation line for small-sized coarse cut demineralized dehydrated cake.
第１０図に図示するこのような実施例は、第８
図に図示する実施例の場合において、脱水機１０
で得られる粗粒カツト脱灰脱水ケーキをライン１
２ａを介して塊砕装置又はトルク均等型塊砕装置
３１に供給し板状又は塊状の脱灰脱水ケーキを小
塊状又は微小塊状に塊砕して小塊状粗粒カツト脱
灰脱水ケーキとし、これをライン３２ａを介して
スラリ調整槽１３に供給する点に特徴がある。 Such an embodiment illustrated in FIG.
In the case of the embodiment illustrated in the figure, the dehydrator 10
The coarse cut demineralized dehydrated cake obtained in
2a to the agglomeration device or the torque equalization type agglomeration device 31 to crush the plate-shaped or lump-like demineralized dehydrated cake into small or micro-aggregated pieces to produce a small-sized coarse cut demineralized dehydrated cake. It is characterized in that it is supplied to the slurry adjustment tank 13 via the line 32a.
以上、第６発明に係る実施例を示す第１０図の
フローシイートに基づいて詳述したように、第６
発明は第１発明の至第５発明で得られる上記(1)乃
至(15)に記載の効果の他に次のような効果が得られ
る。 As described above in detail based on the flow sheet of FIG. 10 showing the embodiment according to the sixth invention, the sixth invention
The invention provides the following effects in addition to the effects described in (1) to (15) above obtained in the first to fifth inventions.
(16) 分級する前に分級しやすいよように希釈し、
また分級によつて粗粒をカツトし、粗粒カツト
希釈低濃度スラリのみを脱灰したのち脱水し、
さらに脱水後の板状又は塊状の粗粒カツト脱灰
脱水ケーキを塊砕装置又はトルク均等型塊砕装
置で小塊状に塊砕してスラリ調整槽に供給する
ため、また、スラリ調整槽では常に超微粉砕ミ
ルで超微粉砕されながら摩砕され丸味を帯びた
超微小粒を含有する脱灰スラリが返送循環され
て来て一諸に調整されるので、これらの相乗効
果によつて極めて良質の製品高濃度脱灰スラリ
を得ることが出来る。(16) Before classification, dilute to make it easier to classify.
In addition, coarse particles are cut by classification, and only the low concentration slurry diluted with coarse particles is deashed and then dehydrated.
Furthermore, after dewatering, the plate-shaped or lump-like coarse cut demineralized dehydrated cake is crushed into small pieces by a crusher or torque-equalizing type crusher and supplied to the slurry adjustment tank. The demineralized slurry containing rounded ultra-fine particles that are ground and ground in an ultra-fine grinding mill is sent back and circulated and adjusted as a whole, so the synergistic effect of these processes results in an extremely high quality slurry. A highly concentrated demineralized slurry can be obtained.
また、第１１図は第６発明の第２実施例であ
り、第１０図に図示する第６発明の第１実施例
に、上記第５発明の第２実施例を図示する第９図
のフローシイートで説明した構成、作用を付加し
て、上記乃至に記載した効果の他に次の効果
をねらつたものである。 Further, FIG. 11 is a second embodiment of the sixth invention, and the flow sheet of FIG. 9 illustrating the second embodiment of the fifth invention is added to the first embodiment of the sixth invention illustrated in FIG. In addition to the effects described above, the following effects are aimed at by adding the structure and operation described in .
分級する前に分級しやすいように希釈し、ま
た分級によつて粗粒をカツトし粗粒含有希釈低
濃度スラリは粗粉砕ミル５に返送して再度粉砕
し、粗粒がカツトされた希釈低濃度スラリのみ
を脱灰したのち脱水し、さらに脱水後の板状又
は塊状の粗粒カツト脱灰脱水ケーキを塊砕装置
又はトルク均等型塊砕装置３１で小塊状に塊砕
してスラリ調整槽１３に供給するため、また、
スラリ調整槽１３では常に超微粉砕ミル２３で
超微粉砕されながら摩砕され丸味を帯びた超微
小粒を含有する脱灰スラリが返送循環されて来
て一諸に調整されるので、これらの相乗効果に
よつて灰分の少ない極めて良質の製品高濃度脱
灰スラリを得ることが出来る。 Before classification, the diluted slurry is diluted to make it easier to classify, and the coarse particles are cut through the classification, and the diluted low concentration slurry containing coarse particles is returned to the coarse grinding mill 5 and crushed again. After deashing only the concentrated slurry, it is dehydrated, and then the dehydrated plate-like or lump-like coarse cut deashing dehydrated cake is crushed into small pieces by a crusher or a torque equalization type crusher 31, and the slurry adjustment tank is processed. 13, and
In the slurry adjustment tank 13, the demineralized slurry containing rounded ultrafine particles that are ground and ground while being ultrafinely pulverized by the ultrafine grinding mill 23 is constantly returned and circulated, so that these slurries are uniformly adjusted. Due to the synergistic effect, it is possible to obtain a high-concentration demineralized slurry with extremely high quality and low ash content.
第１図は本発明の第１発明に係る実施例のフロ
ーシイート、第２図はその第２実施例のフローシ
イート、第３図は第２発明に係る第１実施例のフ
ローシイート、第４図は第３発明に係る第１実施
例のフローシイート、第５図は第３発明に係る第
２実施例のフローシイート、第６図は第４発明に
係る第１実施例のフローシイート、第７図は第４
発明に係る第２実施例のフローシイート、第８図
は第５発明に係る第１実施例のフローシイート、
第９図は第５発明に係る第２実施例のフローシイ
ート、第１０図は第６発明に係る第１実施例のフ
ローシイート、第１１図は第６発明に係る第２実
施例のフローシイート、第１２図は従来の低濃度
湿式高濃度スラリの製造方法に関するフローシイ
ートである。
１…石炭の供給貯留槽、２…石炭の供給ライ
ン、３…粗粉砕ミル供給用タンク、４…粗粉砕ミ
ル供給水の供給ライン、５…粗粉砕ミル、６…低
濃度スラリの輸送ライン、７…脱灰装置、８…灰
の排出ライン、９…低濃度脱灰スラリの輸送ライ
ン、９ａ…粗粒カツト低濃度脱灰スラリの輸送ラ
イン、９ｂ…粗粒カツト希釈低濃度脱灰スラリの
輸送ライン、１０…脱水機、１１…脱水水の排水
ライン、１２…脱灰脱水ケーキの輸送ライン、１
２ａ…粗粒カツト脱灰脱水ケーキの輸送ライン、
１３…スラリ調整槽、１４…調整水用タンク、１
５…調整水の供給ライン、１６…添加剤用タン
ク、１７…添加剤の供給ライン、１８…調整高濃
度脱灰スラリの輸送ライン、１９…調整高濃度脱
灰スラリの輸送ポンプ、２０…分配器、２１…返
送調整高濃度脱灰スラリの返送循環ライン、２２
…返送調整高濃度脱灰スラリの返送循環用輸送ポ
ンプ、２３…超微粉砕ミル、２４…超微小粒含有
脱灰スラリの返送循環ライン、２５…製品高濃度
脱灰スラリの輸送ライン、２６…製品高濃度脱灰
スラリ用タンク、２７…超微粉砕ミル調整水用タ
ンク、２８…超微粉砕ミル調整水の供給ライン、
２９…超微粉砕ミル添加剤用タンク、３０…超微
粉砕ミル添加剤の供給ライン、３１…（トルク均
等型）塊砕装置、３２…小塊状脱灰脱水ケーキの
輸送ライン、３２ａ…小塊状粗粒カツト脱灰脱水
ケーキの輸送ライン、３３…分級器、３４…粗粒
含有低濃度スラリの排出ライン、３４ａ…粗粒含
有低濃度スラリの返送循環ライン、３４ｂ…粗粒
含有希釈低濃度スラリの排出ライン、３４ｃ…粗
粒含有希釈低濃度スラリの返送循環ライン、３５
…粗粒カツト低濃度スラリの輸送ライン、３５ａ
…粗粒カツト希釈低濃度スラリの輸送ライン、３
６…希釈タンク、３７…希釈水用タンク、３８…
希釈水の供給ライン、３９…希釈低濃度スラリの
輸送ライン。
1 is a flow sheet of an embodiment according to the first invention of the present invention, FIG. 2 is a flow sheet of the second embodiment, FIG. 3 is a flow sheet of the first embodiment according to the second invention, and FIG. 4 is a flow sheet of the second embodiment of the invention. 3 is a flow sheet of the first embodiment according to the third invention, FIG. 5 is a flow sheet of the second embodiment according to the third invention, FIG. 6 is a flow sheet of the first embodiment according to the fourth invention, and FIG.
A flow sheet of the second embodiment according to the invention, FIG. 8 is a flow sheet of the first embodiment according to the fifth invention,
9 is a flow sheet of the second embodiment according to the fifth invention, FIG. 10 is a flow sheet of the first embodiment according to the sixth invention, FIG. 11 is a flow sheet of the second embodiment according to the sixth invention, and FIG. The figure is a flow sheet related to a conventional method for manufacturing a low-concentration wet high-concentration slurry. 1...Coal supply storage tank, 2...Coal supply line, 3...Coarse grinding mill supply tank, 4...Coarse grinding mill supply water supply line, 5...Coarse grinding mill, 6...Low concentration slurry transport line, 7...Deashing device, 8...Ash discharge line, 9...Transportation line for low concentration deashing slurry, 9a...Transportation line for coarse cut low concentration deashing slurry, 9b...Coarse cut diluted low concentration deashing slurry Transport line, 10... Dehydrator, 11... Drainage line for dehydrated water, 12... Transport line for deashed and dehydrated cake, 1
2a...Transportation line for coarse cut cut demineralized dehydrated cake,
13... Slurry adjustment tank, 14... Adjustment water tank, 1
5...Adjusted water supply line, 16...Additive tank, 17...Additive supply line, 18...Transportation line for adjusted high concentration demineralized slurry, 19...Transportation pump for adjusted high concentration demineralized slurry, 20...Distribution Container, 21...Return circulation line for return adjusted high concentration demineralized slurry, 22
...Transportation pump for return circulation of high concentration demineralized slurry for return adjustment, 23...Ultra fine grinding mill, 24...Return circulation line for demineralized slurry containing ultrafine particles, 25...Transportation line for product high concentration demineralized slurry, 26... Product high-concentration deashing slurry tank, 27...Ultra-fine pulverization mill adjustment water tank, 28...Ultra-fine pulverization mill adjustment water supply line,
29...tank for ultrafine grinding mill additives, 30...supply line for ultrafine grinding mill additives, 31...(torque uniform type) agglomeration device, 32...transport line for small lump demineralized dewatered cake, 32a...small lumps Transportation line for coarse grain cut deashing and dewatering cake, 33...Classifier, 34...Discharge line for low concentration slurry containing coarse grains, 34a...Return circulation line for low concentration slurry containing coarse grains, 34b...Diluted low concentration slurry containing coarse grains discharge line, 34c... Return circulation line for diluted low concentration slurry containing coarse particles, 35
...Coarse grain cut low concentration slurry transportation line, 35a
...Transportation line for coarse cut diluted low concentration slurry, 3
6... Dilution tank, 37... Tank for dilution water, 38...
Dilution water supply line, 39...transport line for diluted low concentration slurry.
Claims (1)
低濃度石炭水スラリを作り、ついで上記低濃度石
炭水スラリを脱灰したのち脱水し、得られる脱灰
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、添加剤及び上記脱灰脱水
ケーキを、返送されてくる返送超微小粒含有脱灰
石炭水スラリとともに混合・攪拌しながら調整
し、ついで上記スラリ調整槽で得られる調整高濃
度脱灰石炭水スラリを製品として供給しかつ上記
調整高濃度脱灰石炭水スラリの１部を超微粉砕ミ
ルに導き、同超微粉砕ミルで上記調整高濃度脱灰
石炭水スラリの石炭粒を超微粉砕して超微小粒含
有脱灰石炭水スラリとしたのち上記スラリ調整槽
に返送循環させることを特徴とする高濃度石炭水
スラリの製造方法。1. Coarsely pulverize coal in water using a coarse pulverizer mill to create a low concentration coal water slurry, then demineralize and dehydrate the low concentration coal water slurry, and lead the resulting deashed and dehydrated cake to a slurry adjustment tank. The conditioned water, additives, and demineralized dehydrated cake supplied in the same slurry conditioning tank are mixed and stirred together with the returned demineralized coal-water slurry containing ultrafine particles, and then adjusted in the slurry conditioning tank. The adjusted high concentration deashed coal water slurry obtained in step 1 is supplied as a product, and a part of the adjusted high concentration deashed coal water slurry is introduced into an ultra-fine pulverization mill, where the adjusted high concentration deashed coal is produced. A method for producing a highly concentrated coal-water slurry, which comprises ultrafinely pulverizing coal particles in a water slurry to obtain a demineralized coal-water slurry containing ultrafine particles, and then circulating the slurry back to the slurry adjustment tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16145985A JPS6222893A (en) | 1985-07-22 | 1985-07-22 | Production of high-concentration coal-water slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16145985A JPS6222893A (en) | 1985-07-22 | 1985-07-22 | Production of high-concentration coal-water slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6222893A JPS6222893A (en) | 1987-01-31 |
| JPH0576986B2 true JPH0576986B2 (en) | 1993-10-25 |
Family
ID=15735509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16145985A Granted JPS6222893A (en) | 1985-07-22 | 1985-07-22 | Production of high-concentration coal-water slurry |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6222893A (en) |
-
1985
- 1985-07-22 JP JP16145985A patent/JPS6222893A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6222893A (en) | 1987-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |