JPH0813978B2 - High-concentration coal / water slurry production equipment - Google Patents
High-concentration coal / water slurry production equipmentInfo
- Publication number
- JPH0813978B2 JPH0813978B2 JP62162382A JP16238287A JPH0813978B2 JP H0813978 B2 JPH0813978 B2 JP H0813978B2 JP 62162382 A JP62162382 A JP 62162382A JP 16238287 A JP16238287 A JP 16238287A JP H0813978 B2 JPH0813978 B2 JP H0813978B2
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- Prior art keywords
- slurry
- coal
- concentration
- water
- dehydrator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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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・水スラリの製造装置の改良に
関する。TECHNICAL FIELD The present invention relates to an improvement of a high-concentration coal / water slurry production apparatus.
〔従来の技術〕 高濃度石炭・水スラリ（以下、CWMと略す）の製造方
法には、大別して乾式法、高濃度湿式法、低濃度
湿式脱水法の３種類がある。[Prior Art] There are roughly three types of methods for producing high-concentration coal / water slurry (hereinafter abbreviated as CWM): a dry method, a high-concentration wet method, and a low-concentration wet dewatering method.
乾式法は、乾式微粉際した石炭に水及び添加剤を添加
し、調合・撹拌してCWMとする方法である。高濃度湿式
法は、粉砕機中に予め高濃度の状態で石炭、水及び添加
剤を投入し、粉砕と同時にCWMとする方法である。３番
目の低濃度湿式脱水調整法は、粉砕機中で石炭を水と共
に低濃度の状態で粉砕し、低濃度スラリとした後、これ
を脱水機により脱水してケーキとし、更にこのケーキに
添加剤及び少量の水を添加し、調合・撹拌してCWMとす
る方法である。The dry method is a method in which water and additives are added to dry finely ground coal, and the mixture is mixed and stirred to obtain CWM. The high-concentration wet method is a method in which coal, water, and an additive are put into a pulverizer in a high-concentration state in advance, and CWM is performed simultaneously with pulverization. The third low-concentration wet dehydration adjustment method is to pulverize coal with water in a pulverizer in a low-concentration state to make a low-concentration slurry, dehydrate this with a dehydrator to form a cake, and then add to this cake. This is a method in which an agent and a small amount of water are added, mixed and stirred to obtain CWM.
ところで、上述した低濃度湿式脱水調整法によるCWM
の製造装置としては、従来より第３図に示す構造のもの
が知られている。即ち、図中の１は石炭と水を粉砕して
低濃度スラリを調整するための粉砕機である。この粉砕
機には石炭供給管２及び水供給管３が夫々連結されてい
る。４は前記粉砕機１より粉砕され、脱水機５に供給さ
れる低濃度スラリである。また８は脱水機５に供給する
低濃度スラリ４を一時的に貯蔵するためのスラリタン
ク、６は脱水機５より排出される脱水ケーキである。な
お、前記脱水機５で生じた水は循環配管９により前記水
供給管３に供給される。By the way, CWM by the low-concentration wet dehydration adjustment method described above
As the manufacturing apparatus of, the structure shown in FIG. 3 has been conventionally known. That is, 1 in the figure is a crusher for crushing coal and water to adjust the low-concentration slurry. A coal supply pipe 2 and a water supply pipe 3 are connected to the crusher, respectively. A low-concentration slurry 4 is crushed by the crusher 1 and supplied to the dehydrator 5. Further, 8 is a slurry tank for temporarily storing the low-concentration slurry 4 supplied to the dehydrator 5, and 6 is a dehydrated cake discharged from the dehydrator 5. The water generated in the dehydrator 5 is supplied to the water supply pipe 3 through the circulation pipe 9.
スラリ調整槽７には撹拌機10が設けられ、更に水補供
給管11及び添加剤供給用配管13が連結されている。更に
前記スラリ調整槽７の底部には調合されたCWMを吐出す
るための配管14が連結されている。The slurry adjusting tank 7 is provided with a stirrer 10, and is further connected with a water supplement supply pipe 11 and an additive supply pipe 13. Further, a pipe 14 for discharging the prepared CWM is connected to the bottom of the slurry adjusting tank 7.
上述した第３図図示の製造装置において、粉砕機１と
脱水機５が単位時間当りに処理する乾炭の量は製造装置
の安定した連続運転を保つには常に同じでなければなら
ない。In the above-mentioned manufacturing apparatus shown in FIG. 3, the amounts of dry coal processed by the crusher 1 and the dehydrator 5 per unit time must be always the same in order to maintain stable and continuous operation of the manufacturing apparatus.
しかしながら脱水機５として小さい機器据付面積で大
きな過面積を有するところの真空式デイスクフイルタ
を使用した場合、脱水機５の乾炭処理量を粉砕機１の乾
炭処理量に一致させることは必ずしも容易ではない。な
ぜならば、真空式デイスクフイルタの処理能力は脱水
ケーキ厚さ及びデイスク回転数（単位時間当り）の２
つに概ね比例するが、脱水ケーキ厚さは過時間（第
４図に示すようにデイスクがスラリ中に浸り、布面に
ケーキを付着させる工程の時間）、スラリの石炭濃
度、石炭の種類に個有のケーキ付着性、真空度、が
それぞれ増加すれば増加する。これらの関係を第５図〜
第７図に示す。しかしの過時間はのデイスク回転
数を増加すればこれに比例して短かくなり、またの真
空度と脱水ケーキ厚さの関係は第７図に示す如く制御手
段として用いるには適さない。従つて真空式デイスクフ
イルタの処理能力調整の手段としては、の過時間と
のケーキ厚さの関係を考慮しながらのデイスク回転
数を微調整するか、又はのスラリの石炭濃度を操作す
ることしかない。前者の方法は経験と熟練を要し、これ
を自動制御系に組み込んで無人の行わせしるつことは困
難であつた。However, when a vacuum disk filter having a small equipment installation area and a large excess area is used as the dehydrator 5, it is not always easy to match the dry coal treatment amount of the dehydrator 5 with the dry coal treatment amount of the crusher 1. is not. Because the processing capacity of the vacuum disc filter is 2 of the dehydrated cake thickness and the disc rotation speed (per unit time).
The thickness of the dehydrated cake depends on the excess time (the time of the process of dipping the disk into the slurry and attaching the cake to the cloth as shown in Fig. 4), the coal concentration of the slurry, and the type of coal. It increases as the individual cake adhesion and vacuum degree increase. These relationships are shown in FIG.
It is shown in FIG. However, the excess time becomes proportionally shorter as the disc rotation speed increases, and the relationship between the degree of vacuum and the thickness of the dehydrated cake is not suitable for use as control means as shown in FIG. Therefore, the only means of adjusting the processing capacity of the vacuum disk filter is to finely adjust the disk rotation speed while taking into consideration the relationship between the cake thickness and the overtime of or to control the coal concentration of the slurry. Absent. The former method requires experience and skill, and it was difficult to incorporate this into an automatic control system to perform unattended operation.
本発明は、真空脱水機と粉砕機の単位時間当りの乾炭
処理量をバランスさせ装置の連続安定運転が可能となる
高濃度石炭・水スラリ製造装置を提供することを目的と
したものである。An object of the present invention is to provide a high-concentration coal / water slurry production apparatus that balances dry coal treatment amounts per unit time of a vacuum dehydrator and a crusher and enables continuous stable operation of the apparatus. .
本発明は、真空脱水機の直前の石炭水スラリタンクの
液位が一定になるように希釈水を制御して注入し、真空
脱水機に供給する低濃度石炭水スラリの濃度を調整する
ことにより、結果として真空脱水機が単位時間内に処理
する乾炭の量を粉砕機が単位時間内に処理する乾炭の量
と一致させる制御を行うことを新規な特徴とするもので
ある。The present invention, by controlling and injecting dilution water so that the liquid level of the coal water slurry tank immediately before the vacuum dehydrator is constant, by adjusting the concentration of the low-concentration coal water slurry supplied to the vacuum dehydrator As a result, the novel feature is that the amount of dry coal that the vacuum dehydrator processes within a unit time is controlled to match the amount of dry coal that the crusher processes within a unit time.
すなわち本発明は、石炭・水スラリを低濃度で粉砕す
る粉砕機と、概粉砕機より排出された低濃度石炭・水ス
ラリを一旦貯留するスラリタンクと、該スラリタンクよ
り供給される石炭・水スラリを脱水する真空脱水機と、
該真空脱水機により得られる石炭・スラリケーキを所定
高濃度の石炭・水スラリに調整するスラリ調整槽よりな
る高濃度石炭・水スラリ製造装置において、前記スラリ
タンクの液位を一定に保つ希釈水制御注入手段を備えて
なることを特徴とする高濃度石炭・水スラリ製造装置を
提案するものである。That is, the present invention is a crusher for crushing coal / water slurry at a low concentration, a slurry tank for temporarily storing the low-concentration coal / water slurry discharged from the rough crusher, and a coal / water supplied from the slurry tank. A vacuum dehydrator to dehydrate the slurry,
In a high-concentration coal / water slurry production apparatus comprising a slurry adjusting tank for adjusting the coal / slurry cake obtained by the vacuum dehydrator to a predetermined high-concentration coal / water slurry, dilution water for keeping the liquid level of the slurry tank constant. The present invention proposes a high-concentration coal / water slurry production apparatus characterized by comprising control injection means.
そして石炭・水スラリを低濃度で粉砕する粉砕機と、
該粉砕機より排出された低濃度石炭・水スラリを一旦貯
留するスラリタンクと、該スラリタンクより供給される
石炭・水スラリを脱水する真空脱水機と、該真空脱水機
により得られる石炭・スラリケーキを所定高濃度の石炭
・水スラリに調整するスラリ調整槽よりなる高濃度石炭
・水スラリ製造装置において、前記スラリタンクに液位
計を配し、該スラリタンクに希釈水を制御弁等の制御手
段によつて調節して注入する手段を配し、該液位計から
の液位信号により該スラリタンクの液位を一定に保つた
めに必要とされる希釈水供給量を算出し、かつ前記制御
弁に算出した希釈水供給適正量を与える信号を発する機
能を有する制御機能を配してなることを特徴とする高濃
度石炭・水スラリ製造装置を好ましい態様とするもので
ある。And a crusher that crushes coal / water slurry at a low concentration,
A slurry tank for temporarily storing the low-concentration coal / water slurry discharged from the crusher, a vacuum dehydrator for dehydrating the coal / water slurry supplied from the slurry tank, and a coal / slurry obtained by the vacuum dehydrator. In a high-concentration coal / water slurry manufacturing apparatus comprising a slurry adjusting tank for adjusting a cake to a predetermined high-concentration coal / water slurry, a liquid level gauge is arranged in the slurry tank, and dilution water is supplied to the slurry tank such as a control valve. Arranging means for injecting after adjusting by the control means, calculating the dilution water supply amount required to keep the liquid level of the slurry tank constant by the liquid level signal from the liquid level gauge, and A preferred embodiment of the high-concentration coal / water slurry production apparatus is characterized in that the control valve is provided with a control function having a function of issuing a signal giving the calculated appropriate amount of dilution water supply.
すなわち本発明は、真空脱水機に供給される低濃度ス
ラリの濃度が、真空脱水機の過工程に於るケーキの形
成厚さに大きく影響することに着目し、この作用を積極
的に真空脱水機の処理量の制御手段として利用し、真空
脱水機の乾炭処理量を粉砕機の乾炭処理量に一致させよ
うとするものである。That is, the present invention pays attention to the fact that the concentration of the low-concentration slurry supplied to the vacuum dehydrator has a great influence on the thickness of the cake formed in the overstep of the vacuum dehydrator, and this action is positively affected by the vacuum dehydration. It is used as a control means of the processing amount of the machine, so that the dry coal processing amount of the vacuum dehydrator is made to match the dry coal processing amount of the crusher.
すなわち、仮に真空脱水機の乾炭処理能力が粉砕機の
乾炭処理能力が上回つた場合にはスラリタンクの液位が
低下するので、希釈水制御注入手段の作動により希釈水
が注入されスラリタンク内のスラリの石炭濃度は下が
り、これにより真空脱水機の乾炭処理能力は低下し、結
果として粉砕機の乾炭処理能力とバランスする。また仮
に真空脱水機の乾炭処理能力が粉砕機の乾炭処理能力を
下回つた場合にはスラリタンクの液位が上昇するので、
希釈水制御注水手段により希釈水が遮断されスラリタン
ク内のスラリの石炭濃度は上がり、これにより真空脱水
機の乾炭処理能力は向上し、結果として粉砕機の乾炭処
理能力とバランスする。That is, if the dry coal treatment capacity of the vacuum dehydrator exceeds the dry coal treatment capacity of the crusher, the liquid level in the slurry tank will drop, so that the dilution water is injected by the operation of the dilution water control injection means. The coal concentration of the slurry in the tank is reduced, which reduces the dry coal treatment capacity of the vacuum dehydrator and consequently balances the dry coal treatment capacity of the crusher. Also, if the dry coal treatment capacity of the vacuum dehydrator is less than the dry coal treatment capacity of the crusher, the liquid level in the slurry tank will rise,
The dilution water control water injection means shuts off the dilution water to increase the concentration of coal in the slurry in the slurry tank, which improves the dry coal treatment capacity of the vacuum dehydrator and consequently balances the dry coal treatment capacity of the crusher.
以下、本発明の実施例を第１図及び第２図を参照して
詳細に説明する。なお、前述した第３図図示の製造装置
における部材と同様なものは同符号を付して説明を省略
する。Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. The same members as those in the manufacturing apparatus shown in FIG. 3 described above are designated by the same reference numerals, and description thereof will be omitted.
第１図中の12は、脱水機５の直前のスラリタンク８に
循環配管９より希釈水15を分岐させて注入するための制
御弁である。また16はスラリタンク８に取付けられた液
レベル計、17は制御弁12を制御するための制御器であ
る。制御器17には外部よりスラリタンク８の目標液レベ
ル信号S1、及び液レベル計16によつて検知されるスラリ
タンク８の液レベル信号S2がそれぞれ入力される。制御
器17はS2のS1からの偏差に基き制御信号S3を制御弁12に
出力する。これによりスラリタンク８の液レベルを自動
的に目標値に維持することが可能となる。Reference numeral 12 in FIG. 1 is a control valve for branching and injecting the dilution water 15 from the circulation pipe 9 into the slurry tank 8 immediately before the dehydrator 5. Further, 16 is a liquid level meter attached to the slurry tank 8, and 17 is a controller for controlling the control valve 12. The target liquid level signal S 1 of the slurry tank 8 and the liquid level signal S 2 of the slurry tank 8 detected by the liquid level meter 16 are input to the controller 17 from the outside. The controller 17 outputs the control signal S 3 to the control valve 12 based on the deviation of S 2 from S 1 . This makes it possible to automatically maintain the liquid level in the slurry tank 8 at the target value.
以上により、仮に脱水機５の乾炭処理能力が粉砕機１
の乾炭処理能力を上回つた場合にはスラリタンク８の液
レベルが低下するので、制御弁12により希釈水が注入さ
れスラリタンク８内のスラリの石炭濃度は下がり、これ
により脱水機５の乾炭処理能力は低下し、結果として粉
砕機１の乾炭処理能力とバランスする。また仮に脱水機
５の乾炭処理能力が粉砕機１の乾炭処理能力を下回つた
場合にはスラリタンク８の液レベルが上昇するので、制
御弁12により希釈水が遮断されスラリタンク８内のスラ
リの石炭濃度は上がり、これにより脱水機５の乾炭処理
能力は向上し、結果として粉砕機１の乾炭処理能力とバ
ランスする。Due to the above, the dry coal treatment capacity of the dehydrator 5 is temporarily reduced to the crusher 1.
When the dry coal treatment capacity of the slurry tank 8 is exceeded, the liquid level in the slurry tank 8 decreases, so that dilution water is injected by the control valve 12 and the coal concentration of the slurry in the slurry tank 8 decreases, which causes the dehydrator 5 The dry coal treatment capacity is lowered, and as a result, the dry coal treatment capacity is balanced with the dry coal treatment capacity. Further, if the dry coal treatment capacity of the dehydrator 5 is lower than the dry coal treatment capacity of the crusher 1, the liquid level in the slurry tank 8 rises, so that the control valve 12 shuts off the dilution water and the inside of the slurry tank 8 is blocked. The concentration of coal in the slurry increases, which improves the dry coal treatment capacity of the dehydrator 5 and consequently balances the dry coal treatment capacity of the crusher 1.
また第２図は本発明の他の実施例の装置の説明図であ
る。第２図中の18はボールタツプ弁、19はボールタツプ
弁18に付属したフロートである。スラリタンク８の液レ
ベルが低下した場合フロート19が下がり、これに連結さ
れたボールタツプ弁18が開いて希釈水がスラリタンク８
に注入する構成とすることにより、第１図に示す実施例
の如く制御弁、制御器、レベル計等の高価な計装部品を
使用することなく、目的とする効果を得ることが出来る
ものである。Further, FIG. 2 is an explanatory view of an apparatus of another embodiment of the present invention. In FIG. 2, 18 is a ball tap valve, and 19 is a float attached to the ball tap valve 18. When the liquid level in the slurry tank 8 is lowered, the float 19 is lowered, the ball tap valve 18 connected to the float 19 is opened, and the dilution water is supplied to the slurry tank 8.
By injecting into the injection chamber, it is possible to obtain the intended effect without using expensive instrumentation parts such as a control valve, a controller and a level meter as in the embodiment shown in FIG. is there.
以上詳述したように、本発明の装置によれば粉砕器よ
り排出された低濃度石炭・水スラリを一旦貯留するスラ
リタンクの液レベルが一定となるように希釈水を制御弁
等によつて調節して注入することにより、結果として脱
水機が単位時間内に処理する乾炭の量と粉砕機が単位時
間内に処理する乾炭の量をバランスさせることができ、
連続安定運転が可能となる。As described in detail above, according to the device of the present invention, the dilution water is controlled by a control valve or the like so that the liquid level of the slurry tank temporarily storing the low-concentration coal / water slurry discharged from the crusher becomes constant. By adjusting and injecting, as a result, it is possible to balance the amount of dry coal that the dehydrator processes within a unit time and the amount of dry coal that the crusher processes within a unit time,
Continuous stable operation becomes possible.
第１図は本発明の一実施例の装置の説明図、第２図は本
発明の他の実施例の装置の説明図、第３図は従来の高濃
度石炭・水スラリ製造装置の説明図、第４図はCWM製造
装置用脱水機として使用されている真空式デイスクフイ
ルタの作用工程を示す図、第５図は脱水ケーキ厚さと
過時間との関係を示すグラフ、第６図は脱水ケーキ厚さ
とスラリ濃度との関係を示すグラフ、第７図は脱水ケー
キ厚さと過真空度との関係を示すグラフである。 １……粉砕機、２……石炭供給管、３……水供給管、５
……脱水機、７……スラリ調整槽、８……スラリタン
ク、12……制御弁、16……液レベル計、17……制御器、
18……ボールタツプ弁、19……フロート。FIG. 1 is an explanatory view of an apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory view of an apparatus according to another embodiment of the present invention, and FIG. 3 is an explanatory view of a conventional high-concentration coal / water slurry manufacturing apparatus. Fig. 4 is a diagram showing the working process of a vacuum disc filter used as a dehydrator for a CWM manufacturing device, Fig. 5 is a graph showing the relationship between dehydrated cake thickness and excess time, and Fig. 6 is a dehydrated cake. FIG. 7 is a graph showing the relationship between thickness and slurry concentration, and FIG. 7 is a graph showing the relationship between dehydrated cake thickness and over-vacuum degree. 1 ... Crusher, 2 ... Coal supply pipe, 3 ... Water supply pipe, 5
…… Dehydrator, 7 …… Slurry adjusting tank, 8 …… Slurry tank, 12 …… Control valve, 16 …… Liquid level meter, 17 …… Controller,
18 …… Ball tap valve, 19 …… Float.
Claims (1)
機と、該粉砕機より排出された低濃度石炭・水スラリを
一旦貯留するスラリタンクと、該スラリタンクより供給
される石炭・水スラリを脱水する真空脱水機と、該真空
脱水機により得られる石炭・スラリケーキを所定高濃度
の石炭・水スラリに調整するスラリ調整槽よりなる高濃
度石炭・水スラリ製造装置において、前記スラリタンク
の液位を一定に保つ希釈水制御注入手段を備えてなるこ
とを特徴とする高濃度石炭・水スラリ製造装置。1. A crusher for crushing coal / water slurry at a low concentration, a slurry tank for temporarily storing the low-concentration coal / water slurry discharged from the crusher, and a coal / water supplied from the slurry tank. A high-concentration coal / water slurry production apparatus comprising a vacuum dehydrator for dehydrating slurry and a slurry adjusting tank for adjusting the coal / slurry cake obtained by the vacuum dehydrator to a predetermined high-concentration coal / water slurry, wherein the slurry tank is A high-concentration coal / water slurry production apparatus comprising a dilution water control injection means for maintaining a constant liquid level of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62162382A JPH0813978B2 (en) | 1987-07-01 | 1987-07-01 | High-concentration coal / water slurry production equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62162382A JPH0813978B2 (en) | 1987-07-01 | 1987-07-01 | High-concentration coal / water slurry production equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS649295A JPS649295A (en) | 1989-01-12 |
| JPH0813978B2 true JPH0813978B2 (en) | 1996-02-14 |
Family
ID=15753517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62162382A Expired - Lifetime JPH0813978B2 (en) | 1987-07-01 | 1987-07-01 | High-concentration coal / water slurry production equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0813978B2 (en) |
-
1987
- 1987-07-01 JP JP62162382A patent/JPH0813978B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS649295A (en) | 1989-01-12 |
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