JPH0314501B2 - - Google Patents
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- Publication number
- JPH0314501B2 JPH0314501B2 JP17963686A JP17963686A JPH0314501B2 JP H0314501 B2 JPH0314501 B2 JP H0314501B2 JP 17963686 A JP17963686 A JP 17963686A JP 17963686 A JP17963686 A JP 17963686A JP H0314501 B2 JPH0314501 B2 JP H0314501B2
- Authority
- JP
- Japan
- Prior art keywords
- coal
- water
- temperature
- slurry
- water slurry
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- 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、湿式高濃度石炭水スラリー製造方法
に係り、特にスラリーの粉砕熱による温度上昇を
抑え、一定温度に調整することを特徴とする湿式
高濃度石炭水スラリー製造方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a wet high-concentration coal-water slurry manufacturing method, and is particularly characterized by suppressing a temperature rise due to heat of grinding the slurry and adjusting the temperature to a constant level. This invention relates to a wet high concentration coal water slurry manufacturing method.
従来の湿式高濃度石炭水スラリー製造方法は、
湿式ボールミルを用い、破砕された石炭と水及び
界面活性剤から成る分散剤を供給して湿式粉砕を
行い、スラリー化し、石炭濃度が約60重量％以上
の高濃度石炭水スラリーを製造する。この際、必
要に応じてスラリー中の粗粒除去並びに安定化剤
の附加的な添加を行い、さらに高速剪断力の付与
により高濃度石炭水スラリーの性状の向上を図つ
ている。（先行技術文献として、例えば特開昭57
−200493号、特開昭60−8393号、特開昭60−
13887号、実開昭59−79227号、Atkins、Ｅ・
Ｇ・、6th Int、Symp・Coal Slurry
Combustion and Technology、P557、Jun25〜
27、1984などがある。）
湿式高濃度石炭水スラリー製造方法に於いて、
高濃度石炭水スラリーの性状は、石炭及び水の性
状、水温、石炭濃度、ミル運転特性、外気温度、
スラリー温度などの各要因に複雑に依存してお
り、殊にスラリー温度の影響が著しいことは周知
の事実である。
The conventional wet high concentration coal water slurry manufacturing method is
Using a wet ball mill, crushed coal is supplied with a dispersant consisting of water and a surfactant, and wet pulverization is performed to form a slurry, producing a highly concentrated coal-water slurry with a coal concentration of approximately 60% by weight or more. At this time, if necessary, coarse particles are removed from the slurry and a stabilizer is additionally added, and high-speed shearing force is applied to improve the properties of the highly concentrated coal-water slurry. (As a prior art document, for example, JP-A-57
−200493, JP-A-60-8393, JP-A-60-
No. 13887, Utility Model No. 59-79227, Atkins, E.
G., 6th Int, Symp・Coal Slurry
Combustion and Technology, P557, Jun25~
27, 1984, etc. ) In the wet high concentration coal water slurry manufacturing method,
The properties of high-concentration coal-water slurry include properties of coal and water, water temperature, coal concentration, mill operating characteristics, outside air temperature,
It is a well-known fact that it is complexly dependent on various factors such as the slurry temperature, and that the influence of the slurry temperature is particularly significant.
ところで、上記従来の湿式高濃度石炭水スラリ
ー製造方法に於いて、石炭を200メツシユ程度に
粉砕した場合、粉砕熱によつて石炭水スラリーの
温度は外気温度に対し20〜40℃上昇する。従つて
夏期には石炭水スラリーの温度が70℃を超えるこ
とがある。
By the way, in the above-mentioned conventional wet-type high-concentration coal-water slurry manufacturing method, when coal is crushed into about 200 meshes, the temperature of the coal-water slurry rises by 20 to 40°C relative to the outside air temperature due to the heat of crushing. Therefore, the temperature of the coal-water slurry may exceed 70°C in the summer.
石炭水スラリーを燃料として利用する場合、粘
度を1000cp程度に保持する為に、前述の如く石
炭、水に界面活性剤から成る分散剤を添加して粉
砕し、粉砕後安定化剤を添加して安定化処理を行
い、長期間貯蔵するが、夏期に於いて粉砕熱によ
つて石炭水スラリーの温度が70℃を超えると、粘
度が著しく低下し、性状が不安定となる。その結
果分散剤による石炭粒子の分散機能に悪影響を与
え、得られた石炭水スラリーは貯蔵中粗粒子が沈
降して安定性を失つたり、石炭水スラリーの水分
が蒸発して、液面に皮膜が生じる等の現象が生
じ、石炭水スラリーの品質が損われ、輸送、貯蔵
並びに燃焼の操作段階での取扱いに支障を来た
し、円滑な運転が阻害され、性能が低下するとい
う問題点があつた。 When using coal-water slurry as a fuel, in order to maintain the viscosity at around 1000 cp, a dispersant consisting of a surfactant is added to the coal and water and crushed, and a stabilizer is added after crushing. Although it is stabilized and stored for a long period of time, when the temperature of the coal-water slurry exceeds 70°C due to the heat of crushing in the summer, the viscosity decreases significantly and the properties become unstable. As a result, the ability of the dispersant to disperse coal particles is adversely affected, and the resulting coal-water slurry may lose stability due to coarse particles settling during storage, or water in the coal-water slurry may evaporate and drop to the liquid level. There are problems such as the formation of a film, which impairs the quality of the coal-water slurry, which impedes handling during transportation, storage and combustion operations, which impedes smooth operation and reduces performance. Ta.
そこで本発明は、石炭水スラリーの粉砕熱によ
る過度の温度上昇を抑えて略一定温度に調節し、
上記問題点を解決する湿式高濃度石炭水スラリー
製造方法を提供しようとするものである。 Therefore, the present invention suppresses excessive temperature rise due to heat of pulverization of coal water slurry and adjusts the temperature to a substantially constant temperature.
The present invention aims to provide a wet high concentration coal water slurry production method that solves the above problems.
上記問題点を解決するための技術的手段は、石
炭を湿式ミルにて水、分散剤と共に湿式粉砕して
スラリー化し、該スラリーの粉砕熱による温度上
昇を、湿式ミルからの排気中の蒸気を分離復水し
て冷却した冷却水の湿式ミルへの送入により抑制
し、略一定温度に調節することを特徴とするもの
である。
A technical means to solve the above problems is to wet-pulverize coal with water and a dispersant in a wet mill to form a slurry, and reduce the temperature rise due to the heat of grinding of the slurry by reducing the steam in the exhaust gas from the wet mill. This is characterized by controlling the temperature by feeding separated and condensed cooling water into a wet mill, and adjusting the temperature to a substantially constant temperature.
上記の技術的手段により湿式ミル内での石炭水
スラリーの粉砕熱による温度上昇を抑えて略一定
の目標温度に調節できるので、得られた高濃度石
炭水スラリーは分散剤による石炭粒子の分散機能
が保持される。従つて、貯蔵中石炭水スラリー中
の粗粒子が沈降することがなく、粘度並びに性状
が安定する。また貯蔵中の石炭水スラリーの水分
の蒸発が大幅に抑えれら、液面に皮膜が生じるこ
とがない。
By using the above technical means, it is possible to suppress the temperature rise of the coal-water slurry due to the heat of crushing in the wet mill and adjust it to a nearly constant target temperature. is retained. Therefore, coarse particles in the coal-water slurry do not settle during storage, and the viscosity and properties are stabilized. In addition, the evaporation of water in the coal-water slurry during storage is greatly suppressed, and no film is formed on the liquid surface.
本発明の高濃度石炭水スラリー製造方法の実施
例を図によつて詳細に説明する。図は本発明の実
施例に係る構成を示すもので、１は破砕された石
炭２を貯留する石炭貯留槽、３は計量給炭機、４
は湿式ボールミルである。５はポンプ６を有する
水供給管、７はポンプ８を有する分散剤供給管
で、湿式ボールミル４の入口に連通されている。
９は湿式ボールミル４の入口における空気吸入口
である。１０は湿式ボールミル４の排気管で、途
中にミスト分離器１１、送風機１２が設けられて
いる。ミスト分離器１１の底は蒸気管１３を介し
て冷却装置１４に連通され、冷却装置１４は水管
１５を介して復水槽１６に連通され、復水槽１６
はポンプ１７を有する復水管１８を介して湿式ボ
ールミル４の入口に連通されている。１９は湿式
ボールミル４の石炭水スラリー排出管で、２０は
その途中に設けられた石炭水スラリー槽である。
この石炭水スラリー槽２０の入口側の石炭水スラ
リー排出管１９の途中には温度検出器２１が設け
られ、この温度検出器２１が制御装置２２に電気
的に連繁されている。前記冷却装置１４と復水槽
１６との間の水管１５の途中には温度検出器２３
が設けられ、この温度検出器２３が前記制御装置
２２に電気的に連繋されている。前記冷却装置１
４の冷却管１４ａの入口側には調節弁２４が設け
られ、この調節弁２４は制御装置２２により開度
が調節されるよう電気的に連繋されている。
Embodiments of the method for producing high-concentration coal-water slurry of the present invention will be described in detail with reference to the drawings. The figure shows a configuration according to an embodiment of the present invention, in which 1 is a coal storage tank for storing crushed coal 2, 3 is a metering coal feeder, and 4 is a coal storage tank for storing crushed coal 2.
is a wet ball mill. 5 is a water supply pipe having a pump 6, and 7 is a dispersant supply pipe having a pump 8, which are communicated with the inlet of the wet ball mill 4.
9 is an air suction port at the entrance of the wet ball mill 4. 10 is an exhaust pipe of the wet ball mill 4, and a mist separator 11 and a blower 12 are provided in the middle. The bottom of the mist separator 11 is communicated with a cooling device 14 via a steam pipe 13, and the cooling device 14 is communicated with a condensate tank 16 via a water pipe 15.
is connected to the inlet of the wet ball mill 4 via a condensate pipe 18 having a pump 17. 19 is a coal water slurry discharge pipe of the wet ball mill 4, and 20 is a coal water slurry tank provided in the middle thereof.
A temperature detector 21 is provided in the middle of the coal water slurry discharge pipe 19 on the inlet side of the coal water slurry tank 20, and this temperature detector 21 is electrically connected to a control device 22. A temperature detector 23 is installed in the middle of the water pipe 15 between the cooling device 14 and the condensate tank 16.
is provided, and this temperature sensor 23 is electrically linked to the control device 22. The cooling device 1
A control valve 24 is provided on the inlet side of the cooling pipe 14a of No. 4, and the control valve 24 is electrically connected to the control device 22 so that its opening degree is adjusted.
さて、高濃度石炭水スラリーの製造を図によつ
て説明すると、石炭貯留槽１に貯留された石炭２
は計量給炭機３により湿式ボールミル４に所定量
供給され、と同時に水及び分散剤がポンプ６を有
する水供給管５及びポンプ８を有する分散剤供給
管７より湿式ボールミル４に所定量供給される。
そして石炭は湿式ボールミル４の運転によつて湿
式粉砕されて微粒化し、スラリー化して、石炭水
スラリー排出管１９より排出され、一旦石炭水ス
ラリー槽２０に貯留された後貯蔵施設に送られ
る。この石炭の湿式粉砕に於いて、石炭の粉砕作
用に伴つて発生する粉砕熱により石炭水スラリー
の温度が上昇し、特に夏期には70℃を超えること
がある。このように高温の石炭水スラリーが湿式
ボールミル４より排出されると、石炭水スラリー
排出管１９の途中の温度検出器２１により温度が
検出され、その検出信号が制御装置２２に送られ
る。一方湿式ボールミル４内の石炭水スラリーの
温度上昇により、蒸気が多量に生じ、この蒸気が
石炭ミストと共に送風機１２により吸引され、排
気管１０を通してミスト分離器１１に入り、ここ
で蒸気とミストが分離され、ミストは送風機１２
を経て図示せぬ集塵器に送られ、蒸気は蒸気管１
３を通して冷却装置１４に送られる。冷却装置１
４に送られた蒸気は、冷却管１４ａを通る冷却水
により冷却されて復水し、この水が水管１５を通
して復水槽１６に送られて一旦貯留された後、ポ
ンプ１７により復水管１８を通して湿式ボールミ
ル４に供給される。この湿式ボールミル４に供給
される水が冷却装置１４から水管１５を通つて復
水槽１６に送られる途中で、温度検出器２３によ
り温度が検出され、その検出信号が制御装置２３
に送られる。そして制御装置２３では、石炭水ス
ラリーの温度が予め設定された目標温度と比較演
算されて高い場合には、その程度に応じて冷却装
置１４の冷却管１４ａの入口側に設けられた調節
弁２４を開いて、冷却管１４ａを流れる冷却水量
を多くして冷却装置１４での復水温度を低下さ
せ、湿式ボールミル４に、低温の水を供給して、
石炭水スラリーの粉砕熱による温度上昇を抑え、
目標温度に近づける。また制御装置２３で、湿式
ボールミル４に供給される水の温度と検出された
石炭水スラリー温度と比較演算されて、湿式ボー
ルミル４に供給される水の温度が高すぎる場合に
は、調節弁２４の開度が大きくされ、冷却管１４
ａを流れる冷却水量が多くなつて冷却装置１４で
の復水温度が低下され、湿式ボールミル４に供給
される水の温度が低すぎる場合には、調節弁２４
の開度が小さくされ、冷却管１４ａを流れる冷却
水量が少なくなつて冷却装置１４での復水温度が
上昇されることとなる。 Now, to explain the production of high concentration coal water slurry using a diagram, coal 2 stored in coal storage tank 1
A predetermined amount of water and dispersant are supplied to the wet ball mill 4 by the metering coal feeder 3, and at the same time, predetermined amounts of water and dispersant are supplied to the wet ball mill 4 from the water supply pipe 5 with the pump 6 and the dispersant supply pipe 7 with the pump 8. Ru.
The coal is then wet-pulverized by the operation of the wet ball mill 4 to be atomized into slurry, which is discharged from a coal-water slurry discharge pipe 19, stored in a coal-water slurry tank 20, and then sent to a storage facility. In this wet pulverization of coal, the temperature of the coal-water slurry rises due to the heat of pulverization generated by the pulverization of the coal, and may exceed 70°C, especially in the summer. When the high-temperature coal water slurry is discharged from the wet ball mill 4 in this way, the temperature is detected by the temperature detector 21 in the middle of the coal water slurry discharge pipe 19, and the detection signal is sent to the control device 22. On the other hand, a large amount of steam is generated due to the temperature rise of the coal-water slurry in the wet ball mill 4, and this steam is sucked together with coal mist by the blower 12 and enters the mist separator 11 through the exhaust pipe 10, where the steam and mist are separated. The mist is produced by blower 12.
The steam is sent to a dust collector (not shown) through steam pipe 1.
3 to the cooling device 14. Cooling device 1
The steam sent to 4 is cooled by cooling water passing through the cooling pipe 14a and condensed, and this water is sent to the condensation tank 16 through the water pipe 15 and stored once. It is supplied to the ball mill 4. While the water supplied to the wet ball mill 4 is being sent from the cooling device 14 to the condensing tank 16 through the water pipe 15, the temperature is detected by the temperature detector 23, and the detection signal is sent to the control device 23.
sent to. Then, in the control device 23, when the temperature of the coal water slurry is compared with a preset target temperature and is high, a control valve 24 provided at the inlet side of the cooling pipe 14a of the cooling device 14 is operated according to the degree. by opening the cooling pipe 14a to increase the amount of cooling water flowing through the cooling pipe 14a to lower the condensate temperature in the cooling device 14, and supply low-temperature water to the wet ball mill 4.
Suppresses temperature rise due to heat of pulverization of coal water slurry,
Get closer to the target temperature. In addition, the control device 23 compares and calculates the temperature of the water supplied to the wet ball mill 4 with the detected coal water slurry temperature, and if the temperature of the water supplied to the wet ball mill 4 is too high, the control valve 24 The opening degree of the cooling pipe 14 is increased.
If the amount of cooling water flowing through a increases and the condensate temperature in the cooling device 14 decreases, and the temperature of the water supplied to the wet ball mill 4 is too low, the control valve 24
The degree of opening is made smaller, the amount of cooling water flowing through the cooling pipe 14a decreases, and the temperature of condensate in the cooling device 14 increases.
かくして湿式ボールミル４に供給される水は略
一定温度となり、湿式ボールミル４内での石炭水
スラリーの粉砕熱による温度上昇が完全に抑えら
れて、略一定の目標温度に調節され、得られる高
濃度石炭水スラリーも略一定の目標温度となつ
て、分散剤による石炭粒子の分散機能が保持され
る。従つて、貯蔵中石炭水スラリー中の粗粒子が
沈降することがなく、粒度並びに性状が安定す
る。また貯蔵中石炭水スラリーの水分の蒸発が大
幅に抑えられて、液面に皮膜が生じることがな
い。 In this way, the water supplied to the wet ball mill 4 has a substantially constant temperature, and the temperature rise due to the heat of crushing the coal-water slurry in the wet ball mill 4 is completely suppressed, and the target temperature is adjusted to a substantially constant level, resulting in a high concentration. The coal-water slurry also has a substantially constant target temperature, and the dispersing agent maintains its ability to disperse coal particles. Therefore, coarse particles in the coal-water slurry do not settle during storage, and the particle size and properties are stabilized. Also, the evaporation of water in the coal-water slurry during storage is greatly suppressed, and no film is formed on the liquid surface.
以上の説明で判るように本発明による高濃度石
炭水スラリー製造方法によれば、湿式ミル内での
石炭水スラリーの粉砕熱による温度上昇が抑えら
れて略一定の目標温度となるので、高濃度石炭水
スラリーは分散剤による石炭粒子の分散機能が保
持される。従つて、貯蔵中石炭水スラリー中の粗
粒子が沈降することがなく、粒度並びに性状が安
定し、また水分の蒸発が大幅に抑えられ、液面に
皮膜が生じることがないので、品質が安定し、輸
送、貯蔵並びに燃焼の操作段階での取扱いが容易
となり、円滑な運転と性能の向上に寄与できると
いう効果がある。
As can be seen from the above explanation, according to the method for producing high-concentration coal-water slurry according to the present invention, the temperature rise due to the heat of crushing the coal-water slurry in the wet mill is suppressed and the target temperature is maintained at a substantially constant level. The coal-water slurry maintains the dispersion function of the coal particles by the dispersant. Therefore, coarse particles in the coal-water slurry do not settle during storage, and the particle size and properties are stable. Also, evaporation of water is greatly suppressed, and no film is formed on the liquid surface, resulting in stable quality. However, it is easier to handle during transportation, storage, and combustion operations, contributing to smooth operation and improved performance.
図は本発明の高濃度石炭水スラリー製造方法を
実施する手段の構成を示す図である。
３……計量給炭機、４……湿式ボールミル、５
……水供給管、７……分散剤供給管、９……空気
吸入口、１０……排気管、１１……ミスト分離
器、１２……送風機、１４……冷却装置、１６…
…復水槽、１７……ポンプ、１８……復水管、１
９……石炭水スラリー排出管、２０……石炭水ス
ラリー槽、２１，２３……温度検出器、２２……
制御装置、２４……調節弁。
The figure is a diagram showing the configuration of a means for carrying out the method for producing high-concentration coal-water slurry of the present invention. 3...Measuring coal feeder, 4...Wet ball mill, 5
... Water supply pipe, 7 ... Dispersant supply pipe, 9 ... Air intake port, 10 ... Exhaust pipe, 11 ... Mist separator, 12 ... Air blower, 14 ... Cooling device, 16 ...
... Condensate tank, 17 ... Pump, 18 ... Condensate pipe, 1
9... Coal water slurry discharge pipe, 20... Coal water slurry tank, 21, 23... Temperature detector, 22...
Control device, 24... control valve.
Claims (1)
砕してスラリー化し、該スラリーの粉砕熱による
温度上昇を、湿式ミルからの排気中の蒸気を分離
復水して冷却した冷却水の湿式ミルへの送入によ
り抑制し、略一定温度に調整することを特徴とす
る湿式高濃度石炭水スラリー製造方法。1 Coal is wet-pulverized with water and a dispersant in a wet mill to form a slurry, and the temperature rise due to the heat of crushing of the slurry is reduced by separating and condensing the steam in the exhaust gas from the wet mill. A method for producing a wet high-concentration coal-water slurry, characterized by controlling the temperature by feeding the slurry to a substantially constant temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17963686A JPS6336847A (en) | 1986-07-30 | 1986-07-30 | Wet production of high concentration coal aqueous slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17963686A JPS6336847A (en) | 1986-07-30 | 1986-07-30 | Wet production of high concentration coal aqueous slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6336847A JPS6336847A (en) | 1988-02-17 |
| JPH0314501B2 true JPH0314501B2 (en) | 1991-02-26 |
Family
ID=16069228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17963686A Granted JPS6336847A (en) | 1986-07-30 | 1986-07-30 | Wet production of high concentration coal aqueous slurry |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6336847A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0691392A1 (en) | 1994-07-05 | 1996-01-10 | Nippon Shokubai Co., Ltd. | Additive for carbonaceous solid-water slurry, method for production thereof, and carbonaceous solid-water slurry composition |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103447137B (en) * | 2013-08-09 | 2015-10-07 | 陕西煤业化工技术研究院有限责任公司 | One is coal dust preparation system and method safely and efficiently |
| CN104987903B (en) * | 2015-07-13 | 2016-08-24 | 中煤科工清洁能源股份有限公司 | A kind of method preparing gasified coal water slurry |
-
1986
- 1986-07-30 JP JP17963686A patent/JPS6336847A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0691392A1 (en) | 1994-07-05 | 1996-01-10 | Nippon Shokubai Co., Ltd. | Additive for carbonaceous solid-water slurry, method for production thereof, and carbonaceous solid-water slurry composition |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6336847A (en) | 1988-02-17 |
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