JPS60203697A - Production of deashed high-concentration slurry - Google Patents
Production of deashed high-concentration slurryInfo
- Publication number
- JPS60203697A JPS60203697A JP6168884A JP6168884A JPS60203697A JP S60203697 A JPS60203697 A JP S60203697A JP 6168884 A JP6168884 A JP 6168884A JP 6168884 A JP6168884 A JP 6168884A JP S60203697 A JPS60203697 A JP S60203697A
- Authority
- JP
- Japan
- Prior art keywords
- coal
- slurry
- flotation
- deashing
- sent
- 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
Landscapes
- Liquid Carbonaceous Fuels (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は脱灰高濃度スラリーの製造方法に関し、詳しく
は浮遊選別法(浮選)では脱灰しにくい石炭粒子を予め
除去することによって脱灰効果を高めた石炭の脱灰方法
に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a highly concentrated deashing slurry, and more specifically, the present invention relates to a method for producing a highly concentrated deashing slurry. Concerning decalcification methods.
石炭の利用形態の改良として、石炭の液化、ガス化、C
OM等の流体化技術の開発が行われているが、この流体
化技術の一つとして石炭−水系の高濃度スラリーがある
。このスラリーは、74μ以下の石炭粒子を70〜80
%程度含むまで微粉砕し、石炭が65〜75%、水が3
5〜25%の重量割合を有するようにしたものでらる。Coal liquefaction, gasification, C
Fluidization technologies such as OM are being developed, and one of these fluidization technologies is a highly concentrated coal-water slurry. This slurry contains 70 to 80 coal particles of 74μ or less.
Finely pulverized until it contains approximately 65-75% coal and 3% water.
The weight ratio is 5 to 25%.
また粒度をよシ細かくし43μ以下100%の超微粉砕
炭を用いる場合もちる。いずれの場合にも、スラリー化
剤の添加によυ上記石炭濃度においても流体特性を有し
、従来の石油燃料と同様な取り扱いが可能となる利点を
持っている。It is also possible to use ultra-finely pulverized charcoal of 100% finer grain size of 43μ or less. In either case, the addition of a slurrying agent has the advantage that the coal has fluid properties even at the above coal concentration and can be handled in the same way as conventional petroleum fuel.
しかし、石炭をスラリー化して石油燃料と同様な取シ扱
いが可能となったといえども、石炭中の灰分の処理の問
題が解決されたわけではない。即ち、灰分は燃焼時にお
いてボイラー壁を摩耗したシ、燃焼効率を低下させるば
かりか、輸送コストも非経済なものにする。However, even though it has become possible to process coal into a slurry in the same way as petroleum fuel, this does not mean that the problem of processing the ash content in coal has been solved. That is, the ash not only abrades the boiler walls during combustion, reducing combustion efficiency, but also makes transportation costs uneconomical.
そこで、灰分の比較的高い原炭を使用する場合、灰分の
含有量を低下させるために石炭を微粉砕した後、この全
量を脱灰処理する方法が提案されている。だが、この方
法を採用すると、脱灰処理設備が大型化して処理費が高
くなる上、十分な脱灰効果も得られない。Therefore, when using raw coal with a relatively high ash content, a method has been proposed in which the coal is finely pulverized in order to reduce the ash content, and then the entire amount is deashed. However, if this method is adopted, the deashing equipment becomes larger and the processing cost increases, and sufficient deashing effects cannot be obtained.
本発明の目的は、上記のような問題点を解消し、比較的
灰分量の多い石炭を原炭としても、十分に脱灰し得、経
済的な方法で脱灰高濃度スラリーを製造する方法を提供
することにおる。The purpose of the present invention is to solve the above-mentioned problems, and to provide a method for producing a highly concentrated deashed slurry in an economical manner, which allows sufficient deashing even when coal with a relatively high ash content is used as raw coal. We are here to provide you with the following.
本発明者らは、石炭を比重毎に分離し石炭中の灰の賦与
状況を調べると、灰のt1ホ半分は比−重1.5〜1.
6以上の重い石炭中に含まれているが、この重い石炭を
微粉砕した後に浮選を実施しても顕著な脱灰効果を示さ
ず浮選しにくい一方、比重の小さい石炭は浮遊し易く浮
選による脱灰効果も大きいことに着目して本発明を完成
した。The present inventors separated coal according to its specific gravity and examined the state of ash provision in the coal, and found that the t1 half of the ash had a specific gravity of 1.5 to 1.
It is contained in heavy coals with a density of 6 or more, but even if this heavy coal is finely pulverized and then flotated, it does not show a significant deashing effect and is difficult to flotate, while coals with a low specific gravity tend to float easily. The present invention was completed by focusing on the fact that flotation also has a large deashing effect.
即ち、本発明は、粗粒粉砕原料石炭のうち高比重炭を除
去し、残シの低比重炭のみを対象として石炭−水スラリ
ーとじたのち浮選脱灰を行うことを特徴とする脱灰高濃
度スラ′リ−の製造方法である。That is, the present invention is a deashing method characterized in that high-density coal is removed from coarse-grained raw coal, and only the remaining low-density coal is made into a coal-water slurry, followed by flotation deashing. This is a method for producing high concentration slurry.
図は本発明の一実施態様を示す。破砕機1により15m
程度以下に破砕された石炭は、篩2で粗粉(0,5m冨
以上)と微粉(0,5111未満)に分けられる。粗粉
は重液サイクロン3に導入され、ここで比重1.5〜1
.6以上の重い粒子が重液サイクロン3下部よシ除去さ
れる一比重の重い粗粒を除かれた石炭拉、ライン11か
らの微粉と混合され、ライン12よシ湿式粉砕機4に導
入される。ここで74μ以下の粒子を70〜80%程度
含む微粉砕炭、又は、より細かい超微粉砕炭とされ、石
炭濃度1〜10%程度のスラリーに調整されてライン1
3よシ浮選機5に導入される。浮選は、対石炭当り0.
05〜0.3%、好ましくは0.1〜0.25%の捕収
剤および対石炭当90.02〜0.15%、好ましくは
0.03〜0.1%の超泡剤を添加して行われて脱灰処
理が施され、15〜30%、好ましくは18〜25%の
石炭スラリーとされる。浮選脱灰された石炭は、更にラ
イン14より脱水機6に送られて水分25〜35%に脱
水される。その後、ライン15よシ混練機7に送られ、
ここでスラリー化剤注入器8からのスラリー化剤と共に
混練され脱灰高濃度スラリーとなる。力お、高比重粗粒
の除去は重液サイクロンの他に、破砕炭の粒度、灰の賦
与状況等によりジグ、湿式サイクロン等を用いて行って
も良い。また可能であれば篩2を経ず破砕炭を直接重液
サイクロンに導入しても良い。The figure shows one embodiment of the invention. 15m by crusher 1
The coal crushed to a certain extent is separated into coarse powder (more than 0.5 m thick) and fine powder (less than 0.5111 m) using a sieve 2. The coarse powder is introduced into heavy liquid cyclone 3, where the specific gravity is 1.5 to 1.
.. Heavy particles of 6 or more are removed from the bottom of the heavy liquid cyclone 3, mixed with fine powder from the coal sieve from which heavy coarse particles of 1 specific gravity have been removed, line 11, and introduced into the wet crusher 4 through line 12. . Here, finely pulverized coal containing about 70 to 80% of particles of 74μ or less, or finer ultra-fine pulverized coal, is adjusted to a slurry with a coal concentration of about 1 to 10%.
3. It is introduced into the flotation machine 5. Flotation is 0.0% per coal.
05-0.3%, preferably 0.1-0.25% collector and 90.02-0.15%, preferably 0.03-0.1% superfoaming agent based on coal. The coal slurry is then deashed to form a coal slurry with a concentration of 15 to 30%, preferably 18 to 25%. The flotated and deashed coal is further sent to a dehydrator 6 through a line 14 and dehydrated to a moisture content of 25 to 35%. After that, it is sent to the kneading machine 7 through line 15,
Here, it is kneaded together with the slurrying agent from the slurrying agent injector 8 to form a highly concentrated demineralized slurry. In addition to a heavy liquid cyclone, the removal of coarse particles with high specific gravity may be performed using a jig, a wet cyclone, etc. depending on the particle size of the crushed coal, the ash application situation, etc. Furthermore, if possible, the crushed coal may be directly introduced into the heavy liquid cyclone without passing through the sieve 2.
本発明でスラリー化剤はスラリーの流動安定化のために
用いられるものであって、アニオン系、カチオン系、ノ
ニオン系の界面活性剤が単独でまたは組み合わせて用い
られ、炭種によって適宜選択される。この具体例を挙げ
れば、アニオン系界面活性剤としては、脂肪油硫酸エス
テル塩、高級アルコール硫酸エステル塩、非イオンエー
テル硫酸エステル塩、オレフィン硫酸エステル塩、アル
キルアリルスルホン酸塩、二塩基酸エステルスルホン酸
塩、ジアルキルスルホコハク酸塩、アシルザルコルシネ
ート、アルキルヘンセンスルホン酸塩、アルキル硫酸エ
ステル塩、ジアルキルスルホコハク酸エステル塩、アル
キル酸もしくは/および無水マレイン酸共重合体、多環
式芳香族スルホン化物もしくはホルマリン化合物などが
例示できる。また、カチオン系界面活性剤としてはアル
キルアミン塩、第4級アミン塩などが使用され、ノニオ
ン系界面活性剤としてはポリオキシアルキルエーテル、
ポリオキシエチレンアルキルフェノールエーテル、オキ
シエチレン・オキシプロピレンブロックポリマー、ポリ
オキシエチレンアルキルアミン、ツル2タン脂肪酸エス
テル、破すオキシエチレンソルビタン脂肪酸エステルな
どが用いられる。In the present invention, the slurry agent is used to stabilize the fluidity of the slurry, and anionic, cationic, and nonionic surfactants are used alone or in combination, and are appropriately selected depending on the type of coal. . To give specific examples, examples of anionic surfactants include fatty oil sulfate salts, higher alcohol sulfate salts, nonionic ether sulfate salts, olefin sulfate salts, alkylaryl sulfonates, and dibasic acid ester sulfones. Acid salts, dialkyl sulfosuccinates, acyl sarcorsinates, alkyl hensensulfonates, alkyl sulfate ester salts, dialkyl sulfosuccinate ester salts, alkyl acids and/or maleic anhydride copolymers, polycyclic aromatic sulfonates Alternatively, formalin compounds can be exemplified. In addition, as cationic surfactants, alkyl amine salts, quaternary amine salts, etc. are used, and as nonionic surfactants, polyoxyalkyl ethers,
Polyoxyethylene alkylphenol ethers, oxyethylene/oxypropylene block polymers, polyoxyethylene alkylamines, polyoxyethylene sorbitan fatty acid esters, and oxyethylene sorbitan fatty acid esters are used.
本発明によれば、浮選しにくい石炭を事前に除去するた
め、高い脱灰率を得ることができる上、実質的にスラリ
ーの生産性や経済性が高まる。According to the present invention, since coal that is difficult to float is removed in advance, a high deashing rate can be obtained, and the productivity and economic efficiency of the slurry are substantially increased.
以下、実施例によシ本発明の効果を具体的に示す。Hereinafter, the effects of the present invention will be specifically illustrated by examples.
実施例
灰の賦与状況が表−1に示す如き石炭を用いて脱灰試験
を行った。Example A deashing test was conducted using coal whose ash application conditions were as shown in Table 1.
実施例として、高比重(比重1.6以上)粗粒を除去し
た後に74μ以下80%でスラリー石炭濃度5.3%に
調整したものを浮選脱灰した。As an example, after removing coarse particles with high specific gravity (specific gravity 1.6 or more), a slurry with a coal density of 80% below 74μ and adjusted to a coal concentration of 5.3% was subjected to flotation and deashing.
比較例として、高比重粗粒を除去することなく全量を浮
選脱灰した。試験結果は表−2に示す通りである。なお
、表−2中、AおよびZは高い可燃物回収率を得ること
を目的とし浮選東件を設定し、Bおよび〆は前記4還条
件を変更させた条件下で浮選を行ったものである。As a comparative example, the entire amount was subjected to flotation and deashing without removing high specific gravity coarse particles. The test results are shown in Table-2. In addition, in Table 2, A and Z set flotation conditions for the purpose of obtaining a high combustible material recovery rate, and B and 〆 conducted flotation under conditions that changed the above-mentioned 4-return conditions. It is something.
(以下余白)
試験結果から明らかなように本発明によれば、浮選しに
くい石炭を事前に除去するため、全量浮選法による脱灰
と比べ、同程度の可燃物回収率を得る場合には高い脱灰
率を得ることができることが判る、(Left below) As is clear from the test results, according to the present invention, coal that is difficult to flotate is removed in advance, so compared to deashing using the total flotation method, it is possible to obtain the same level of combustible recovery rate. It can be seen that a high demineralization rate can be obtained with
図は本発明の一実施態様を示したものである。
1・・・破砕機 2・・・篩
3・・・重液サイクロン 4・・・湿式粉砕機5・・・
浮選機 6・・・脱水機
7・・・混練機The figure shows one embodiment of the invention. 1... Crusher 2... Sieve 3... Heavy liquid cyclone 4... Wet crusher 5...
Flotation machine 6... Dehydrator 7... Kneading machine
Claims (1)
低比重炭のみを対象として石炭−水スラリーとしたのち
浮選脱灰を行うことを特徴とする脱灰高濃度スラリーの
製造方法。1. Production of a highly concentrated deashed slurry, which is characterized by removing high-density coal from the coarse-grained raw coal, turning only the remaining low-density coal into a coal-water slurry, and then performing flotation and deashing. Method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6168884A JPS60203697A (en) | 1984-03-29 | 1984-03-29 | Production of deashed high-concentration slurry |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6168884A JPS60203697A (en) | 1984-03-29 | 1984-03-29 | Production of deashed high-concentration slurry |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60203697A true JPS60203697A (en) | 1985-10-15 |
Family
ID=13178447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6168884A Pending JPS60203697A (en) | 1984-03-29 | 1984-03-29 | Production of deashed high-concentration slurry |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60203697A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5837090A (en) * | 1981-08-28 | 1983-03-04 | Dai Ichi Kogyo Seiyaku Co Ltd | Viscosity depressant for highly concentrated coal/water slurry |
JPS58168692A (en) * | 1982-03-31 | 1983-10-05 | Hitachi Ltd | Preparation of high-concentration aqueous coal slurry |
JPS58213096A (en) * | 1982-06-07 | 1983-12-10 | Hitachi Ltd | Preparation of coal/water slurry |
-
1984
- 1984-03-29 JP JP6168884A patent/JPS60203697A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5837090A (en) * | 1981-08-28 | 1983-03-04 | Dai Ichi Kogyo Seiyaku Co Ltd | Viscosity depressant for highly concentrated coal/water slurry |
JPS58168692A (en) * | 1982-03-31 | 1983-10-05 | Hitachi Ltd | Preparation of high-concentration aqueous coal slurry |
JPS58213096A (en) * | 1982-06-07 | 1983-12-10 | Hitachi Ltd | Preparation of coal/water slurry |
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