JPS62198B2 - - Google Patents
Info
- Publication number
- JPS62198B2 JPS62198B2 JP55141504A JP14150480A JPS62198B2 JP S62198 B2 JPS62198 B2 JP S62198B2 JP 55141504 A JP55141504 A JP 55141504A JP 14150480 A JP14150480 A JP 14150480A JP S62198 B2 JPS62198 B2 JP S62198B2
- Authority
- JP
- Japan
- Prior art keywords
- coal
- oil
- synthetic resin
- pulverized coal
- ash
- 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
Links
- 239000003245 coal Substances 0.000 claims description 79
- 239000000057 synthetic resin Substances 0.000 claims description 46
- 229920003002 synthetic resin Polymers 0.000 claims description 46
- 239000007787 solid Substances 0.000 claims description 45
- 238000000034 method Methods 0.000 claims description 21
- 238000005469 granulation Methods 0.000 claims description 20
- 230000003179 granulation Effects 0.000 claims description 20
- 239000008187 granular material Substances 0.000 claims description 18
- 239000002002 slurry Substances 0.000 claims description 18
- 239000003250 coal slurry Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 6
- 238000010298 pulverizing process Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 2
- 235000019198 oils Nutrition 0.000 description 36
- 239000003921 oil Substances 0.000 description 35
- 239000002245 particle Substances 0.000 description 6
- 239000003350 kerosene Substances 0.000 description 5
- 239000003610 charcoal Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- GNVXPFBEZCSHQZ-UHFFFAOYSA-N iron(2+);sulfide Chemical compound [S-2].[Fe+2] GNVXPFBEZCSHQZ-UHFFFAOYSA-N 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 239000004533 oil dispersion Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 239000000341 volatile oil Substances 0.000 description 1
Description
産業上の利用分野
この発明は、含油脱灰炭の製造方法に関する。
従来の技術
天然に産出する石炭中には灰分が比較的多く含
まれているが、これらの灰分はシリカ（SiO2）、
硫化鉄（FeS）およびアルミナ（Al2O3）等を主成
分とするものであり、通常石炭中に７〜25％程度
の割合で含まれている。このような石炭中の灰分
をＸ線マイクロアナライザで観察すると、灰分は
５μｍ〜数十μｍの大きさの粒状で偏在している
ことが明らかである。このような灰分を石炭から
除去する方法としては、従来灰分を含む原炭を粉
砕し、得られた粉炭を水と混合して粉炭スラリー
をつくつたのち、このスラリーに結合剤として油
を添加して、粉炭と油をそのまま造粒し、ついで
造粒物と、灰分を含むスラリーとを分離する方法
がすでに知られている。灰分が除去せられた造粒
物はペレツト状の含油脱灰炭であり、これは燃料
として使用せられる。しかしながら、このような
従来の方法では、石炭より充分に灰分を除去する
ことができないという問題があつた。というの
は、石炭中の灰分を充分除去するためには、石炭
をこれに含まれる灰分と同程度の大きさに、すな
わち５μｍ〜数十μｍの大きさに非常に細かく粉
砕する必要があるが、石炭をあまり細かく粉砕す
ると、粉炭の表面積が増大し、結合剤としての油
を多く使用しなければならないし、また造粒時間
が非常に長くかかるといううらみがあり、このた
め石炭をあまり細かく細かく粉砕することができ
ず、結局石炭から灰分を充分に除去することがで
きないという問題があつた。
発明の目的
この発明の目的は、上記の問題を解決し、石炭
から灰分を充分に除去することができて、灰分の
含有量が非常に少ない含油脱灰炭を短時間で能率
よく製造することができる方法を提供しようとす
るにある。
発明の構成
この発明は、上記の目的を達成するために、灰
分を含む石炭を粉砕して微粉炭をつくり、この微
粉炭と水とを混合して微粉炭スラリーをつくる工
程と、この灰分を含む微粉炭スラリーに、油およ
び造粒核となる親油性合成樹脂製粒状固形物を混
合して造粒する工程と、親油性合成樹脂製粒状固
形物を含む造粒物をスラリー中より分離して水で
洗浄することにより、灰分を除去する工程と、洗
浄した造粒物を乾燥する工程と、乾燥した造粒物
を分解してペレツト状の含油脱灰炭と親油性合成
樹脂製粒状固形物とに分離し、含油脱灰炭を得る
とともに、親油性合成樹脂製粒状固形物を回収し
て上記造粒工程に返送する工程とからなる含油脱
灰炭の製造方法を要旨としている。
この発明の方法を、以下図面を参照しながらさ
らに詳しく説明する。
この発明の方法は、つぎの５つの工程よりなる
ものである。
第１工程：
灰分を含む天然の石炭をたとえば湿式ボール・
ミルにより粉砕して、粒径数百μｍから数十μｍ
の微粉炭をつくる。原炭中には通常７〜25重量％
の灰分が含まれているが、粉砕により灰分も細か
く砕かれる。つぎに、この灰分を含む微粉炭と水
とを混合して微粉炭スラリーをつくる。場合によ
つては石炭を粒径数μｍのいわゆる超微粉炭に粉
砕することもある。石炭の粉砕は水中で行なうの
が好ましく、粉砕後はスラリーの濃度調整のため
にさらに所要量の水を添加する。
第２工程：
つぎにこの微粉炭スラリーに、油および造粒核
となる親油性合成樹脂製粒状固形物を混合して造
粒する。ここで、油としては、灯油、軽油、重
油、蒸留残渣油および植物油等を使用する。油の
使用量は、たとえば微粉炭に対して約10〜30重量
％である。また油の分散が容易なるように界面活
性剤を少量添加することもある。造粒核となる親
油性合成樹脂製粒状固形物は、親油性を有してい
て、しかもあとの回収が容易であるようなもので
あることが必要であり、また、比重は石炭の比
重、すなわち1.4に近似していることが望まし
い。このような親油性合成樹脂製粒状固形物とし
ては、粒径約１mm〜数mmの硬質ポリ塩化ビニル等
の合成樹脂製粒状物を使用する。親油性合成樹脂
製粒状固形物は微粉炭に対して通常１：１の割合
で混合するのが好ましいが、親油性合成樹脂製粒
状固形物と微粉炭の総量はスラリー中において30
重量％以下であり、この値を越えない範囲におい
て微粉炭に対する親油性合成樹脂製粒状固形物の
使用割合を増減しても勿論よい。
微粉炭スラリーと、油と、造粒核となる親油性
合成樹脂製粒状固形物を混合するにはつぎの３つ
の方法がある。
(i) 微粉炭スラリーに親油性合成樹脂製粒状固形
物を混合し、ついでこのスラリー中に油を混合
する。
(ii) 親油性合成樹脂製粒状固形物に予め油を添加
して、親油性合成樹脂製粒状固形物の表面に油
を付着させておき、ついでこの油付き親油性合
成樹脂製粒状固形物を微粉炭スラリー中に混合
する。
(iii) 微粉炭スラリーに油を混合し、ついでこのス
ラリーに親油性合成樹脂製粒状固形物を混合す
る。
上記のような混合物を撹拌して造粒するには、
金網製撹拌翼を備えた造粒装置あるいはその他の
既知の造粒装置を使用する。この造粒の過程にお
いては、親油性合成樹脂製粒状固形物の表面に油
が付着せられ、この油付き親油性合成樹脂製粒状
固形物を核としてこれの表面の油に微粉炭が順次
付着してゆき、いわゆる転動造粒によつて微粉炭
が加速度的にきわめて迅速に造粒せられ、したが
つて造粒時間が非常に短い。また親油性合成樹脂
製粒状固形物を使用しているので油の使用量が非
常に少なくてすむものである。一方、微粉炭と同
程度の大きさに粉砕された灰分は、水中に残留す
る。
なお、原炭中の灰分の含有量がたとえば20重量
％程度と非常に多いような場合には、造粒を行な
う前に一次脱灰処理を行なつてもよい。すなわ
ち、微粉炭スラリーと親油性合成樹脂製粒状固形
物と油を混合すると、微粉炭と親油性合成樹脂製
粒状固形物と油を含む液相と、灰分を含む水より
なるスラリーとに分れる。この灰分を含むスラリ
ーを、微粉炭を含む液相から分離し、ついでこの
微粉炭を含む液相を清水で洗浄する。これによつ
て灰分のかなりの量が除かれる。
第３工程：
つぎにスラリー中より微粉炭と沸点油と親油性
合成樹脂製粒状固形物とよりなる造粒物を分離し
て洗浄することにより、灰分を除去する。この操
作は微粉炭を含むスラリーをたとえばフイルター
の上に流して、洗浄水を上から噴霧することによ
り行なう。場合によつては分離後の造粒物を遠心
分離機にかけてさらに水分を除去することもあ
る。灰分を含むスラリーは、その後シツクナーお
よび濾過機等を備えた水処理装置に導いて処理す
ることにより、灰分と水とに分離する。
第４工程：
つぎに微粉炭と油と親油性合成樹脂製粒状固形
物とよりなる洗浄後の造粒物を乾燥し、水分を完
全に除去する。
第５工程：
乾燥した造粒物をたとえば振動を与えることに
より分解して、ペレツト状の含油脱灰炭と親油性
合成樹脂製粒状固形物とに分離することにより、
含油脱灰炭を得るとともに、親油性合成樹脂製粒
状固形物を回収して上記第２番目の造粒工程に返
送する。この場合親油性合成樹脂製粒状固形物に
は油が若干量付着しているが、この親油性合成樹
脂製粒状固形物にさらに油を添加したのち造粒工
程に返送してもよいし、また油を添加することな
くそのまま返送してもよい。
このようにして製造された含油脱灰炭は、充分
に灰分が除去せられており、燃料としてそのまま
で有効に使用せられるものである。
なお、油を含まない脱灰炭を製造する必要があ
る場合には、この含油脱灰炭についてさらに脱油
処理を行なえばよい。この処理は、造粒のさい油
として灯油、ガソリン等の揮発性のものを使用し
た場合に、たとえば加熱して油を揮散させること
により行なうものであり、また重油等を油として
使用した場合には溶剤によつて油を抽出すること
により行なうものである。
実施例
つぎに、この発明の実施例を説明する。
実施例 １
灰分含有量7.02重量％のブレアゾール炭（オー
ストラリア産）を粉砕して、200メツシユ以下、
すなわち粒径74μｍ以下の微粉炭をつくり、これ
に水を混合して微粉炭スラリーをつくる。つぎに
この微粉炭スラリーに親油性合成樹脂製粒状固形
物を混合した。親油性合成樹脂製粒状固形物は硬
質ポリ塩化ビニル製で、直径３mmおよび高さ1.5
mmの短い円柱状を有しており、また比重は1.4で
石炭の比重と近似していた。スラリーの配合量
は、微粉炭５重量％および親油性合成樹脂製粒状
固形物５重量％とした。
つぎに、このスラリー中に灯油を微粉炭に対す
る量で20重量％混合し、このスラリーを造粒装置
に導入して造粒した。その後スラリー中より親油
性合成樹脂製粒状固形物を含む造粒物を分離して
水で洗浄することにより、灰分を除去し、洗浄後
の造粒物を乾燥し、乾燥した造粒物に振動を与え
て分解し、ペレツト状の含油脱灰炭を得た。一
方、分離された親油性合成樹脂製粒状固形物を回
収し、これを造粒工程に返して再使用した。
このようにして製造した含油脱灰炭の灰分含有
量を測定するために溶剤によつて油を抽出し、得
られた含油脱灰炭について灰分含有量を測定した
ところ、微粉炭に対して1.74重量％の灰分が含ま
れているだけであつた。
なお、比較のために、従来法により微粉炭５重
量％を含み親油性合成樹脂製粒状固形物を含まな
いスラリーについて上記の場合と同様に脱灰処理
を行なつたところ、得られた含油脱灰炭には、
3.32重量％の灰分が含まれていた。
実施例 ２
灰分含有量12.14重量％の大同炭（中国産）を
使用して、この発明の方法により含油脱灰炭を製
造した。この実施例２において上記実施例１の場
合と異なる点は、硬質ポリ塩化ビニルよりなる親
油性合成樹脂製粒状固形物に予め灯油を付着させ
たのち、これを微粉炭スラリー中に混合する点に
ある。この実施例２のその他の点は上記実施例１
の場合と全く同様であり、得られた含油脱灰炭に
ついての灰分含有量を下記の表に示した。また同
じ大同炭を使用し、親油性合成樹脂製粒状固形物
を使用しない従来法の結果も合せて示した。なお
灰分含有量は油を除去したのちの微粉炭に対する
割合を示すものである。
実施例 ３
実施例２と同じ大同炭を使用し、この発明の方
法により含油脱灰炭を製造した。この実施例３に
おいて、上記実施例１の場合と異なる点は、微粉
炭スラリーに灯油を所定量混合したのち、親油性
合成樹脂製粒状固形物を混合する点にある。この
実施例３のその他の点は上記実施例１の場合と同
様であり、得られたこの発明の方法による結果
と、親油性合成樹脂製粒状固形物を使用しない従
来法の結果を下記表に示した。
INDUSTRIAL APPLICATION FIELD This invention relates to a method for producing oil-impregnated deashed coal. Conventional technology Naturally produced coal contains a relatively large amount of ash, but this ash contains silica (SiO 2 ),
It is mainly composed of iron sulfide (FeS) and alumina (Al 2 O 3 ), and is usually contained in coal at a ratio of about 7 to 25%. When the ash content in such coal is observed using an X-ray microanalyzer, it is clear that the ash content is unevenly distributed in the form of particles with a size of 5 μm to several tens of μm. The conventional method for removing ash from coal is to crush raw coal containing ash, mix the resulting powdered coal with water to create a powdered coal slurry, and then add oil as a binder to this slurry. A method is already known in which pulverized coal and oil are granulated as they are, and then the granulated material is separated from a slurry containing ash. The granulated material from which the ash content has been removed is pellet-shaped oil-impregnated deashed coal, which is used as fuel. However, such conventional methods have a problem in that ash cannot be removed more fully than from coal. This is because, in order to sufficiently remove the ash content in coal, it is necessary to grind the coal very finely to a size comparable to that of the ash contained in the coal, that is, to a size of 5 μm to several tens of μm. However, if the coal is pulverized too finely, the surface area of the pulverized coal will increase, more oil must be used as a binder, and the granulation time will be very long. There was a problem in that the ash could not be sufficiently removed from the coal because it could not be pulverized. Purpose of the Invention The purpose of the present invention is to solve the above problems and efficiently produce oil-impregnated deashed coal that can sufficiently remove ash from coal and has a very low ash content in a short time. I'm trying to provide a way to do that. Composition of the Invention In order to achieve the above object, the present invention includes a process of pulverizing coal containing ash to create pulverized coal, mixing this pulverized coal with water to create pulverized coal slurry, and pulverizing this ash. A step of granulating a pulverized coal slurry by mixing oil and a granular solid made of a lipophilic synthetic resin to serve as granulation nuclei, and a step of separating the granulated material containing the granulated solid made of a lipophilic synthetic resin from the slurry. A process of removing ash by washing with water, a process of drying the washed granules, and a process of decomposing the dried granules to produce pellet-shaped oil-impregnated deashing coal and a granular solid made of lipophilic synthetic resin. The gist is a method for producing oil-impregnated demineralized coal, which comprises the steps of separating the oil-impregnated deashed charcoal into oil-impregnated deashed charcoal, and collecting the granular solids made of lipophilic synthetic resin and returning them to the granulation process. The method of the present invention will be explained in more detail below with reference to the drawings. The method of this invention consists of the following five steps. 1st step: Natural coal containing ash is heated in a wet ball, for example.
Grind with a mill to obtain particles with a particle size of several hundred μm to several tens of μm
to produce pulverized coal. Usually 7-25% by weight in raw coal
The ash content is finely ground through crushing. Next, this pulverized coal containing ash is mixed with water to create a pulverized coal slurry. In some cases, coal may be pulverized into so-called ultra-fine coal with a particle size of several μm. The coal is preferably pulverized in water, and after pulverization, a required amount of water is added to adjust the concentration of the slurry. Second step: Next, this pulverized coal slurry is mixed with oil and a granular solid made of a lipophilic synthetic resin that will serve as granulation nuclei, and granulated. Here, as the oil, kerosene, light oil, heavy oil, distillation residue oil, vegetable oil, etc. are used. The amount of oil used is, for example, about 10 to 30% by weight based on pulverized coal. A small amount of surfactant may also be added to facilitate oil dispersion. The granular solids made of lipophilic synthetic resin that serve as granulation nuclei must be lipophilic and easy to recover later, and the specific gravity must be the same as that of coal. In other words, it is desirable that it approximate 1.4. As such a granular solid material made of a lipophilic synthetic resin, a granular material made of a synthetic resin such as hard polyvinyl chloride having a particle size of about 1 mm to several mm is used. It is usually preferable to mix the lipophilic synthetic resin granular solids with the pulverized coal at a ratio of 1:1, but the total amount of the lipophilic synthetic resin granular solids and pulverized coal is 30% in the slurry.
It is of course possible to increase or decrease the ratio of the oleophilic synthetic resin granular solids to the pulverized coal within a range not exceeding this value. There are the following three methods for mixing pulverized coal slurry, oil, and granular solids made of lipophilic synthetic resin that serve as granulation nuclei. (i) A granular solid made of lipophilic synthetic resin is mixed into a pulverized coal slurry, and then oil is mixed into this slurry. (ii) Add oil in advance to the granular solid made of lipophilic synthetic resin so that the oil adheres to the surface of the granular solid made of lipophilic synthetic resin, and then add the oil-coated granular solid made of lipophilic synthetic resin. Mix into pulverized coal slurry. (iii) Oil is mixed into the pulverized coal slurry, and then granular solids made of lipophilic synthetic resin are mixed into this slurry. To stir and granulate the mixture as above,
A granulator equipped with a wire mesh impeller or other known granulator is used. In this granulation process, oil is attached to the surface of the granular solid made of lipophilic synthetic resin, and pulverized coal is sequentially attached to the oil on the surface of this granular solid made of lipophilic synthetic resin as a core. As a result, pulverized coal is granulated very rapidly in an accelerated manner by so-called rolling granulation, and therefore the granulation time is very short. Furthermore, since granular solids made of lipophilic synthetic resin are used, the amount of oil used can be extremely small. On the other hand, ash that has been crushed to the same size as pulverized coal remains in the water. Note that if the ash content in the raw coal is very high, for example about 20% by weight, a primary deashing treatment may be performed before granulation. That is, when pulverized coal slurry, granular solids made of lipophilic synthetic resin, and oil are mixed, it separates into a liquid phase containing pulverized coal, granular solids made of oleophilic synthetic resin, and oil, and a slurry consisting of water containing ash. . This slurry containing ash is separated from the liquid phase containing pulverized coal, and then the liquid phase containing pulverized coal is washed with fresh water. This removes a significant amount of ash. Third step: Next, the granules made of pulverized coal, boiling point oil, and lipophilic synthetic resin granular solids are separated from the slurry and washed to remove ash. This operation is carried out by, for example, pouring a slurry containing pulverized coal onto a filter and spraying washing water onto it. In some cases, the separated granules may be centrifuged to further remove moisture. The slurry containing ash is then introduced into a water treatment device equipped with a thickener, a filter, etc., and treated, thereby separating it into ash and water. Fourth step: Next, the washed granules made of pulverized coal, oil, and granular solids made of lipophilic synthetic resin are dried to completely remove moisture. Fifth step: By decomposing the dried granules, for example by applying vibrations, and separating them into pellet-like oil-impregnated demineralized coal and granular solids made of lipophilic synthetic resin,
While obtaining oil-impregnated deashed coal, the granular solids made of lipophilic synthetic resin are recovered and returned to the second granulation step. In this case, a small amount of oil is attached to the lipophilic synthetic resin granular solid, but it is also possible to add oil to the lipophilic synthetic resin granular solid and then return it to the granulation process, or It may be returned as is without adding oil. The oil-impregnated deashed coal produced in this manner has the ash content sufficiently removed and can be effectively used as a fuel as it is. Note that if it is necessary to produce deashed coal that does not contain oil, this oil-containing deashed coal may be further subjected to oil removal treatment. This treatment is performed when volatile oil such as kerosene or gasoline is used as the oil during granulation, for example by heating to volatilize the oil, and when heavy oil etc. is used as the oil. This is done by extracting the oil with a solvent. Embodiments Next, embodiments of the present invention will be described. Example 1 Blairsol coal (produced in Australia) with an ash content of 7.02% by weight was crushed to 200 mesh or less,
That is, pulverized coal with a particle size of 74 μm or less is produced, and water is mixed with this to create pulverized coal slurry. Next, granular solids made of lipophilic synthetic resin were mixed into this pulverized coal slurry. The granular solids made of lipophilic synthetic resin are made of hard polyvinyl chloride and have a diameter of 3 mm and a height of 1.5 mm.
It had a short cylindrical shape with a length of mm, and its specific gravity was 1.4, which was close to that of coal. The content of the slurry was 5% by weight of pulverized coal and 5% by weight of granular solids made of lipophilic synthetic resin. Next, kerosene was mixed in this slurry in an amount of 20% by weight based on pulverized coal, and this slurry was introduced into a granulating device and granulated. After that, the granules containing the lipophilic synthetic resin granular solids are separated from the slurry and washed with water to remove the ash content.The washed granules are dried, and the dried granules are vibrated. was decomposed to obtain pellet-like oil-impregnated demineralized coal. On the other hand, the separated granular solids made of lipophilic synthetic resin were recovered and returned to the granulation process for reuse. In order to measure the ash content of the oil-impregnated deashed coal produced in this way, the oil was extracted with a solvent, and the ash content of the obtained oil-impregnated deashed coal was measured. It contained only % by weight of ash. For comparison, a slurry containing 5% by weight of pulverized coal and no oleophilic synthetic resin granular solids was deashed in the same manner as in the above case. For ash charcoal,
It contained 3.32% by weight of ash. Example 2 Oil-impregnated deashed coal was produced by the method of the present invention using Datong coal (produced in China) with an ash content of 12.14% by weight. This Example 2 differs from the above Example 1 in that kerosene is applied to the granular solids made of lipophilic synthetic resin made of hard polyvinyl chloride in advance, and then this is mixed into the pulverized coal slurry. be. The other points of this Example 2 are the above-mentioned Example 1.
The ash content of the obtained oil-impregnated deashed coal is shown in the table below. Also shown are the results of a conventional method using the same Daido charcoal but without the use of lipophilic synthetic resin granular solids. Note that the ash content indicates the ratio to the pulverized coal after oil has been removed. Example 3 Using the same Daido coal as in Example 2, oil-impregnated demineralized coal was produced by the method of the present invention. This Example 3 differs from the above Example 1 in that a predetermined amount of kerosene is mixed into the pulverized coal slurry, and then a granular solid made of lipophilic synthetic resin is mixed therein. The other points of this Example 3 are the same as those of Example 1 above, and the results obtained by the method of the present invention and the results of the conventional method that does not use granular solids made of lipophilic synthetic resin are shown in the table below. Indicated.
【表】
発明の効果
この発明の方法は、上述の次第で、灰分を含む
石炭を非常に細かい微粉炭に粉砕し、この微粉炭
スラリーに油を混合して微粉炭を造粒するさいに
造粒核となる親油性合成樹脂製粒状固形物を使用
するものであるから、油の添加量が非常に少なく
てすみ、また造粒時間が短くてよく、含油脱灰炭
を能率よく製造し得る。そのうえ造粒核となる造
粒固形物として親油性合成樹脂製粒状固形物を使
用するものであるから、耐久性にすぐれていて、
何回も循環使用でき、非常に経済的である。さら
に親油性合成樹脂製粒状固形物の中には灰分が全
く含まれておらず、この親油性合成樹脂製粒状固
形物を核として造粒するため、微粉炭の造粒過程
における灰分の巻込の量が非常に少なく、石炭か
ら灰分を充分に除去することができ、灰分の含有
量が非常に少ない含油脱灰炭を製造することがで
きるものである。したがつてこの発明の方法によ
り製造した含油脱灰炭を燃料として使用した場合
には、燃焼し易く、単位量当りの発熱量が高いう
えに、灰の発生が非常に少なく、安定化し易いと
いう顕著な効果を奏するものである。[Table] Effects of the Invention As described above, the method of the present invention involves pulverizing coal containing ash into very fine pulverized coal, mixing oil with this pulverized coal slurry, and granulating the pulverized coal. Since granular solids made of lipophilic synthetic resin are used as granule nuclei, the amount of oil added is very small, and the granulation time is short, making it possible to efficiently produce oil-impregnated demineralized coal. . Furthermore, since it uses a granulated solid made of lipophilic synthetic resin as the granulated solid that becomes the granulation nucleus, it has excellent durability.
It can be used repeatedly and is very economical. Furthermore, the granular solids made of lipophilic synthetic resin do not contain any ash, and since the granular solids made of lipophilic synthetic resin are used as the core for granulation, ash is included in the pulverized coal granulation process. It is possible to sufficiently remove ash from coal and produce oil-impregnated deashed coal with a very low ash content. Therefore, when the oil-impregnated deashed coal produced by the method of this invention is used as a fuel, it is easy to burn, has a high calorific value per unit amount, generates very little ash, and is easily stabilized. This has a remarkable effect.
図面は、この発明の方法を実施する工程を順次
示すブロツク図である。
The drawings are block diagrams sequentially illustrating the steps of carrying out the method of the invention.
Claims (1)
この微粉炭と水とを混合して微粉炭スラリーをつ
くる工程と、この灰分を含む微粉炭スラリーに、
油および造粒核となる親油性合成樹脂製粒状固形
物を混合して造粒する工程と、親油性合成樹脂製
粒状固形物を含む造粒物をスラリー中より分離し
て水で洗浄することにより、灰分を除去する工程
と、洗浄した造粒物を乾燥する工程と、乾燥した
造粒物を分解してペレツト状の含油脱灰炭と親油
性合成樹脂製粒状固形物とに分離し、含油脱灰炭
を得るとともに、親油性合成樹脂製粒状固形物を
回収して上記造粒工程に返送する工程とからなる
含油脱灰炭の製造方法。1. Pulverized coal is created by pulverizing coal containing ash,
The process of mixing this pulverized coal and water to create a pulverized coal slurry, and this pulverized coal slurry containing ash.
A step of mixing and granulating oil and a granular solid made of a lipophilic synthetic resin to serve as granulation cores, and a step of separating the granulated material containing the granular solid made of a lipophilic synthetic resin from the slurry and washing it with water. , a step of removing ash, a step of drying the washed granules, and a step of decomposing the dried granules and separating them into pellet-shaped oil-impregnated deashing coal and a granular solid made of lipophilic synthetic resin, A method for producing oil-impregnated deashed coal, which comprises the steps of obtaining oil-impregnated deashed coal, and collecting granular solids made of lipophilic synthetic resin and returning them to the granulation process.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14150480A JPS5765777A (en) | 1980-10-08 | 1980-10-08 | Production of oil-containing deashed coal |
| AU75583/81A AU531120B2 (en) | 1980-10-08 | 1981-09-23 | Removing ash from coal |
| US06/305,157 US4389306A (en) | 1980-10-08 | 1981-09-24 | Process for removing ash from coal |
| GB8129766A GB2086419B (en) | 1980-10-08 | 1981-10-02 | Process for removing ash from coal |
| DE3139620A DE3139620C2 (en) | 1980-10-08 | 1981-10-06 | Process for removing ash from coal |
| BR8106434A BR8106434A (en) | 1980-10-08 | 1981-10-06 | PROCESS FOR REMOVING COAL ASH |
| CA000387466A CA1169001A (en) | 1980-10-08 | 1981-10-07 | Process for removing ash from coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14150480A JPS5765777A (en) | 1980-10-08 | 1980-10-08 | Production of oil-containing deashed coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5765777A JPS5765777A (en) | 1982-04-21 |
| JPS62198B2 true JPS62198B2 (en) | 1987-01-06 |
Family
ID=15293484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14150480A Granted JPS5765777A (en) | 1980-10-08 | 1980-10-08 | Production of oil-containing deashed coal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5765777A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6026093A (en) * | 1983-07-22 | 1985-02-08 | Hitachi Zosen Corp | Preparation of deashed coal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3665066A (en) * | 1969-11-28 | 1972-05-23 | Canadian Patents Dev | Beneficiation of coals |
-
1980
- 1980-10-08 JP JP14150480A patent/JPS5765777A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3665066A (en) * | 1969-11-28 | 1972-05-23 | Canadian Patents Dev | Beneficiation of coals |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5765777A (en) | 1982-04-21 |
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