JPS5893792A - Preparation of high-concentration slurry - Google Patents
Preparation of high-concentration slurryInfo
- Publication number
- JPS5893792A JPS5893792A JP19172381A JP19172381A JPS5893792A JP S5893792 A JPS5893792 A JP S5893792A JP 19172381 A JP19172381 A JP 19172381A JP 19172381 A JP19172381 A JP 19172381A JP S5893792 A JPS5893792 A JP S5893792A
- Authority
- JP
- Japan
- Prior art keywords
- slurry
- coal
- concn
- low
- pulverized coal
- 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.)
- Pending
Links
- 239000002002 slurry Substances 0.000 title claims abstract description 39
- 239000003245 coal Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000010298 pulverizing process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 16
- 239000007788 liquid Substances 0.000 abstract description 6
- 239000006260 foam Substances 0.000 abstract description 4
- 238000005187 foaming Methods 0.000 abstract description 4
- 239000002245 particle Substances 0.000 description 5
- 125000000217 alkyl group Chemical group 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- -1 fatty acid sodium salt Chemical class 0.000 description 3
- 239000004088 foaming agent Substances 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- POULHZVOKOAJMA-UHFFFAOYSA-N dodecanoic acid Chemical compound CCCCCCCCCCCC(O)=O POULHZVOKOAJMA-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 239000005639 Lauric acid Substances 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 150000008051 alkyl sulfates Chemical class 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- POULHZVOKOAJMA-UHFFFAOYSA-M dodecanoate Chemical compound CCCCCCCCCCCC([O-])=O POULHZVOKOAJMA-UHFFFAOYSA-M 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229940070765 laurate Drugs 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Landscapes
- Liquid Carbonaceous Fuels (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、流動性全保有する液性限界濃度（液体として
取扱い可能な流動性を有する限界濃度）以上の高濃度ス
ラリーの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a highly concentrated slurry having a liquid critical concentration that retains all its fluidity (a critical concentration that has fluidity that allows it to be handled as a liquid).
石炭の高濃度水スラリーの製造は従来、高効率の配管輸
送を目的として、■石炭の粒度分布を調整して高濃度化
を達成する方法と、■最近世界的に研究が行われるよう
になった分散剤アクリルアマイド糸水溶性高分子剤およ
び安尾剤等を祭加して粒子相互の摩擦による流動抵抗全
低減することで、高濃度スラリーの流動化全達成しよう
とする方法等が仰られている。Traditionally, the production of highly concentrated water slurry of coal has been carried out for the purpose of highly efficient piping transportation.Recently, research has been conducted around the world. A method has been proposed that attempts to completely fluidize a highly concentrated slurry by adding a dispersant such as acrylamide thread, a water-soluble polymer agent, and an tailing agent to completely reduce the flow resistance caused by friction between particles. ing.
Ｃ１）の方法は、所定の粒度分布に調会された石炭全一
般的な攪拌装置付の容器にてスラリー調整を行うもので
、この方法では粒度分布構成に爵別の比率設定を要する
ものであり、用途が限られること、例えば石炭専焼ボイ
ラで部用するには、再粉砕処理が必要となる。また、液
性限界濃度は体積磯波で５０〜６０谷量％程度に限界が
あり、石炭比重１．３の場合、６６電重％程度が重量濃
度の限界である。Method C1) involves preparing a slurry of coal that has been adjusted to a predetermined particle size distribution in a container equipped with a general stirring device, and this method requires setting a specific ratio for the particle size distribution structure. However, its uses are limited, such as when it is used in coal-fired boilers, requiring re-grinding treatment. Further, the liquid critical concentration is limited to about 50 to 60% by weight in the surf, and in the case of coal specific gravity of 1.3, the limit of the weight concentration is about 66% by weight.
（３）の方法では、石炭の水に対する分散効釆全有する
化学薬品や、粒子摩擦を低減する性質を有する流動化剤
を使用して液性限界＃度全上昇させることにより石炭高
ｍ［水スラリーを製造している。この方法では、粒度分
布を時に調整する必要がなく高濃度化できるが、長時間
の貯蔵性、静置安冗性に乏しく、攪拌なしでは、固体粒
子は分離して鯛沈降により圧密１−ヘ一つくり、再流動
化が困難となるため船舶輸送、あるいはタンク貯蔵時の
取扱いが問題となる。In method (3), the coal height m [water Manufactures slurry. This method does not require occasional adjustment of the particle size distribution and can achieve high concentrations, but it is poor in long-term storage and stability, and without stirring, solid particles separate and undergo consolidation by sedimentation. Since it is difficult to make one piece and re-fluidize it, handling during shipping or storage in tanks becomes a problem.
本発明は従来の石炭高濃度水スラリーの短所全補いつつ
、従来にない石炭高濃度水スラリーの製法を提供するこ
とを目的とするもので、石炭水スラリーに空気連行剤を
添加混合し気泡含有型のスラリーとして液性限界濃度を
画クシたこと、および石炭の高濃度水スラリーの製造方
法において、低濃度から篩濃度化への工程を段階的に行
うことで攪拌による空気連行を容易に（２、所要動力全
節減したこと全、特徴とするものである。The purpose of the present invention is to provide a method for producing an unprecedented coal-water slurry while compensating for all the shortcomings of the conventional coal-water slurry. In addition, in the production method of high-concentration water slurry of coal, air entrainment by stirring is easily carried out by carrying out the process from low concentration to sieve concentration in stages ( 2. It is characterized by a total reduction in the required power.
すなわち、本発明は、石炭全乾式粉砕した後、水と混合
攪拌して低濃度スラリーを調整し、同低濃度スラリー全
直列に配置した複数の混合攪拌機へ導入し、同、各混合
攪拌へ前記粉砕炭と空気連行剤と全供給して混合攪拌し
、順次高濃度スラリー化していくことを％徴とする高濃
度スラ゛リーの製造方法に関するものである。That is, in the present invention, after completely dry-pulverizing coal, a low-concentration slurry is prepared by mixing and stirring with water, and the low-concentration slurry is introduced into a plurality of mixers arranged in series, and the above-mentioned slurry is introduced into a plurality of mixers arranged in series. The present invention relates to a method for producing a highly concentrated slurry, which includes supplying all of the pulverized coal and an air entraining agent, mixing and stirring, and sequentially forming a highly concentrated slurry.
空気連行剤は起泡剤と気泡安定剤との混合物であり、各
々の具体例全挙げると次のようであ起泡剤としては、
１）アルキル硫酸塩、Ｒ−Ｏ８ＯｓＮａ ： Ｒはｃ１
！〜ｃｐｓの直鎖アルキル基、
２）脂肪酸ナトリウム塩、Ｒ−ＣＯＯＮａ：）（はＣＩ
Ｉ Ｓ−Ｃ＋ａの直鎖アルキル基、キル基、
４）アルカノールアミド、ＲＣ’ＯＮＨ（ＣＨｌＣＨｌ
Ｏ）ｎ Ｈ： Ｒｉｄ Ｃ＋ｔ 〜ＣＩ４ ＋７） 直
鎖７ ルキル基、５）アルキルエーテルサルフェート、
Ｒ−０（ＣＨｔＣＨｔＯ）ＳＯｓＮａ： ＲはＣＩ！〜
ｃ１４の直鎖アルキル基、
等が挙げられる。The air entraining agent is a mixture of a foaming agent and a foam stabilizer, and the specific examples of each are as follows.As the foaming agent, 1) Alkyl sulfate, R-O8OsNa: R is c1
! ~ cps linear alkyl group, 2) fatty acid sodium salt, R-COONa:) (is CI
I SC+a straight chain alkyl group, kyl group, 4) alkanolamide, RC'ONH (CHlCHl
O) n H: Rid C+t ~ CI4 +7) Straight chain 7 alkyl group, 5) alkyl ether sulfate, R-0(CHtCHtO)SOsNa: R is CI! ~
c14 straight chain alkyl group, and the like.
一方、気泡安定剤としては、
６）ラウリン酸ジェタノールアミド、
７）ポリアクリル′酸誘導体、
等が挙げられ、このもの全上記υ〜５）に混合して空気
連行剤として使用する。混合割合は起泡剤１０に対し、
気泡安定剤１〜５程度である。On the other hand, examples of the bubble stabilizer include 6) lauric acid jetanolamide, 7) polyacrylic acid derivatives, etc., which are mixed with all of the above υ to 5) and used as an air entraining agent. The mixing ratio is 10 parts of the foaming agent,
The amount of bubble stabilizer is about 1 to 5.
不発明方法全第１図のクローシートにより具体的に説明
する〇
石炭１全乾式粉砕磯２Ａで粉砕し”た後、乾いた僅粉砕
炭３の一部３１を低濃度水スラリー調優器５に導入し、
水１２と共に調整器５に内蔵する攪拌機によって水中に
微粉炭を分散し低濃度水スラリー６を調整する〇
低濃度水スラリー６と乾いた微粉砕炭３の一１祁３２、
および気泡連行剤刀の一部１３１を混合器７に導入して
起泡作用を有する攪拌器にて混会して気泡含有型中＃度
水スラリー８を製造し、次に混合器９に導入し、同様に
微粉砕炭３″および気泡連行剤１６２と共に気泡含有型
スラリーを保持しながら混会し、これ全−繰り返しなが
ら石炭濃度を徐々に高めていく。そして最終段の混合器
１１にて所ボの濃度条件、気泡含有率等の性状全有する
石炭高濃度水スラリー１４を製造する。The non-inventive method will be explained in detail with reference to the claw sheet shown in Figure 1: After the coal 1 is completely pulverized in the dry pulverizing rock 2A, a portion 31 of the dry slightly pulverized coal 3 is added to the low concentration water slurry conditioner 5. introduced in
Pulverized coal is dispersed in water with water 12 by a stirrer built in the regulator 5 to prepare a low concentration water slurry 6 〇Low concentration water slurry 6 and dry pulverized coal 3 11 ke 32,
and a portion 131 of the bubble entraining agent are introduced into the mixer 7 and mixed with a stirrer having a foaming action to produce a bubble-containing medium-temperature water slurry 8, which is then introduced into the mixer 9. In the same manner, the pulverized coal 3'' and the bubble entraining agent 162 are mixed while maintaining the bubble-containing slurry, and the coal concentration is gradually increased by repeating this process.Then, in the final stage mixer 11, the coal concentration is gradually increased. A highly concentrated coal water slurry 14 having all the desired concentration conditions, bubble content, and other properties is produced.
本発明５では、まず石炭を一２００メソシー（２００メ
ツシユ パス、７４μｍ）７０〜８０チ程度に乾式粉砕
する。その後の低濃度スラリーの濃度、攪拌複数、添加
する微粉炭の量、空気連行剤の量は最終濃度？何チにす
るかで異なるが、本発明方法で達成し得る８０重量％の
場合を例にとると、高濃度化は１段７５％で初期濃度５
０チから目的濃度８０係まで６０係高めるために６段階
全役けるような具体例を挙げることができる。また空気
連行剤は最終的に石炭に対し１％程度になるように分け
て添加するのがよく、この石炭および空気連行剤の添加
の仕方の例を第２図に示す。In the present invention 5, coal is first dry-pulverized to about 70 to 80 inches (200 mesh passes, 74 μm). What is the final concentration of the subsequent low concentration slurry, multiple stirrings, amount of pulverized coal added, amount of air entrainment agent? Although it depends on how many layers are used, taking as an example the case of 80% by weight that can be achieved by the method of the present invention, the high concentration is 75% in one stage and the initial concentration is 5%.
A specific example can be given in which all 6 levels are used to increase the target concentration from 0 to 80 by 60. Further, the air entraining agent is preferably added in portions so that the final amount is about 1% based on the coal, and an example of how to add the coal and the air entraining agent is shown in FIG.
本発明方法にまり仄のような幼釆が奏せられる。The method of the present invention can be used in a very young way.
■ 低濃度スラリーに微粉炭を混合していった場合、粘
匿が上昇していき、液性限界濃度付近にな″ると高粘度
となり、ついには流動性がなくなる現象に対し、空気連
行剤を添加し、起泡作用全有する混合器にて混合するこ
とで気泡含有型スラリーを製造でき、液性限界譲度全高
くすることができる。■ When pulverized coal is mixed into a low-concentration slurry, the viscosity increases, and as it approaches the liquid limit concentration, the viscosity becomes high, and fluidity eventually disappears. By adding and mixing in a mixer having a foaming effect, a bubble-containing slurry can be produced, and the liquid property limit yield can be completely increased.
これについて空気連行剤添加率と気泡率の関係、および
気泡率とスラリー粘度の関係全下記の実施例でみた結果
全各々第３図および第４図に示す。Regarding this, the relationship between the air entraining agent addition rate and the foam ratio, and the relationship between the foam ratio and the slurry viscosity are all shown in the following examples, and the results are shown in FIGS. 3 and 4, respectively.
■ 央験条件
ａ）石炭と水の混合割合
石炭重量７０チに対し、水３０チ
ｂ）石炭の校区分布
０．５朋〜０１龍 ５０チ
Ｑ、 １ ｍ１１１以下 ５０チ
Ｃ）空気連行剤
アルキルエーテルサルフェート
（Ｃ＋ｔＨｔａＯ（ＣＨｔＣＨｔＯ） Ｓ ０ｓＮ−ａ
、 ’３１０部に対し、ラウリン酸ジェタノール、ア
ミ ド（Ｒ＝ＣＯＮ（ＣＥｔＣＨｔＯＨ）ｔ １３を
１綿混合したもの全便用Ｏ
ｄ）測定方法
１）気泡率・ガラスシリンダによる嵩比重測定ｉｉ）
粘 匿・・・Ｂ型帖匿計
これらの図から、空気連行剤を添加し、気泡率が上がる
と、向−スラリー濃度でも、スラリー粘度が低下するこ
とが分る。■ Central test conditions a) Mixing ratio of coal and water: Coal weight 70 cm, water 30 cm b) Coal area distribution 0.5 to 01 dragon 50 cm Q, 1 m111 or less 50 cm C) Air entraining agent alkyl Ether sulfate (C+tHtaO(CHtCHtO) S 0sN-a
, '310 parts, jetanol laurate, a
Mid (R=CON(CEtCHtOH)t 13
1 cotton mixture O for whole stool d) Measuring method 1) Bulk density measurement using a glass cylinder ii)
Viscosity: Type B viscosity meter From these figures, it can be seen that when an air entraining agent is added and the bubble rate increases, the slurry viscosity decreases even when the slurry concentration is directed toward the slurry.
（２）混合器を直列に、複数個使用することで高濃度化
工程を段階的に分割し、混合、起泡全容易にし、装置動
力全節減すると共に部分的爾端匿化による凝固゛閉塞等
のトラブルを解消する。(2) By using multiple mixers in series, the high concentration process can be divided into stages, making mixing and foaming easier, reducing the total power of the equipment, and preventing coagulation and blockage by partially condensing. Eliminate such problems.
第１図は、本発明方法の一実施態様を示すフローシート
であり、第２図は、不発“明方法における高濃度化の具
体例全示す図であり、第６図および第４図は不発明方法
の効果を示すグラフである。
１夏代理人 円 １） 切復代理人 萩
原 亮 −FIG. 1 is a flow sheet showing one embodiment of the method of the present invention, FIG. 2 is a diagram showing all specific examples of high concentration in the uninvented method, and FIGS. This is a graph showing the effect of the invention method.
Claims (1)
ーを調製し、該低濃度スラリー全、直列に配置した複数
の混合挑拌機へ導入すると共に、各混合攪拌機へ前記粉
砕炭と空気連行剤とを供給して混合攪拌し、順次高濃度
スラリー化していくこと全特徴とする、高濃度スラリー
の製造方法。After dry-pulverizing coal, a low-concentration slurry is prepared by mixing and stirring with water, and the entire low-concentration slurry is introduced into a plurality of mixing agitators arranged in series, and the pulverized coal and air are added to each mixing agitator. A method for producing a highly concentrated slurry, which is characterized by supplying an entraining agent, mixing and stirring, and sequentially forming a highly concentrated slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19172381A JPS5893792A (en) | 1981-12-01 | 1981-12-01 | Preparation of high-concentration slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19172381A JPS5893792A (en) | 1981-12-01 | 1981-12-01 | Preparation of high-concentration slurry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5893792A true JPS5893792A (en) | 1983-06-03 |
Family
ID=16279406
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19172381A Pending JPS5893792A (en) | 1981-12-01 | 1981-12-01 | Preparation of high-concentration slurry |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5893792A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058493A (en) * | 1983-09-09 | 1985-04-04 | Kawasaki Heavy Ind Ltd | Manufacture of aqueous slurry of carbon-containing composition |
| JPH02232296A (en) * | 1989-03-06 | 1990-09-14 | Central Res Inst Of Electric Power Ind | Preparation of coal-water slurry |
-
1981
- 1981-12-01 JP JP19172381A patent/JPS5893792A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058493A (en) * | 1983-09-09 | 1985-04-04 | Kawasaki Heavy Ind Ltd | Manufacture of aqueous slurry of carbon-containing composition |
| JPH02232296A (en) * | 1989-03-06 | 1990-09-14 | Central Res Inst Of Electric Power Ind | Preparation of coal-water slurry |
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