JPS60133092A - Method of grading up low-quality coal - Google Patents
Method of grading up low-quality coalInfo
- Publication number
- JPS60133092A JPS60133092A JP23970383A JP23970383A JPS60133092A JP S60133092 A JPS60133092 A JP S60133092A JP 23970383 A JP23970383 A JP 23970383A JP 23970383 A JP23970383 A JP 23970383A JP S60133092 A JPS60133092 A JP S60133092A
- Authority
- JP
- Japan
- Prior art keywords
- low
- coal
- water
- quality
- reformed
- 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
- Coke Industry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は低品位炭の高品質化方法に係り、特に低温乾留
ｔこよって生じた熱分解水の処理に好適な低品位炭の高
品質化方法に関するものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for improving the quality of low-rank coal, and particularly to improving the quality of low-rank coal suitable for treating pyrolysis water produced by low-temperature carbonization. It is about the method.
従来の低温乾留によって生じた熱分解水の処理は廃水処
理装置を用いて放出可能な清浄水にした上、河川などへ
放出するのが一般的となっていたが、この熱分解水中に
は多くのフェノールをはじめ、不純物を多く含んでおり
、廃水処理が複雑とな□す、結果的には改質質へはねか
えり、甚だ不経済であった。In the conventional treatment of pyrolysis water produced by low-temperature carbonization, it has become common practice to use wastewater treatment equipment to turn it into clean water that can be released, and then to release it into rivers, etc. However, there are many It contains many impurities, including phenol, making wastewater treatment complicated, and as a result, it has to be reformed, which is extremely uneconomical.
本発明の目的は、低温乾留により発生した熱分解水の廃
水処理を不要にすることで、低品位炭の改質質を低減で
きる低品位炭の高品質化方法を提供することにある。An object of the present invention is to provide a method for improving the quality of low-rank coal that can reduce the amount of reforming of low-rank coal by eliminating the need for wastewater treatment of pyrolysis water generated by low-temperature carbonization.
本発明は、予備乾燥による脱水後の低品位炭から低温乾
留により発生した熱分解水を、低品位炭が低温乾留によ
り高品質化された石炭（以下、改質炭）に散水すること
を特徴とするもので、低温乾留により発生した熱分解水
の廃水処理を不要にしようとするものである。The present invention is characterized in that pyrolysis water generated by low-temperature carbonization from low-rank coal after dehydration through preliminary drying is sprinkled onto coal (hereinafter referred to as reformed coal) whose quality has been improved from low-rank coal by low-temperature carbonization. This aims to eliminate the need for wastewater treatment of pyrolysis water generated by low-temperature carbonization.
本発明者等は、低品位炭の高品質化技術について検討を
進めてい（段階で、次のような認識を得た。The present inventors have been proceeding with studies on technology to improve the quality of low-rank coal (at this stage, they have come to the following realization.
（１）改質炭中には、低温乾留直後の時点では、水分は
ほとんどなくなるが、しかし、ある期間経過するうちに
空気中の水蒸気や雨水をある程度吸収する。(1) Immediately after low-temperature carbonization, there is almost no water in the reformed coal, but after a certain period of time it absorbs some amount of water vapor and rainwater in the air.
（２） 改質炭は脱水状態に近いので発塵し易く、ある
程度の散水を必要とする。(2) Modified coal is in a nearly dehydrated state, so it easily generates dust and requires a certain amount of watering.
（３）熱分解氷は、低温乾留時の熱処理温度によってそ
の量を調節できる。(3) The amount of pyrolyzed ice can be adjusted by adjusting the heat treatment temperature during low-temperature carbonization.
したがって、以上のことがらを有機的に結びつけるなら
ば、低品位炭の高品質化プロセスを、熱分解水の系外へ
の放出をなくして廃水処理設備が不用となり経済的で、
かつ、環境面からもクリーンなプロセスとする二とがで
きる。Therefore, if the above-mentioned factors are organically linked, the process of improving the quality of low-rank coal can be made economical by eliminating the need for wastewater treatment equipment by eliminating the release of pyrolysis water outside the system.
Moreover, the process can be made environmentally clean.
本究明の一実施例を第１図、第２図で説明する。An embodiment of this research will be explained with reference to FIGS. 1 and 2.
第１図で、低品位炭ｌは、乾燥機２で予備乾燥され、含
有していた水分３が除去される。脱水された低品位炭は
乾留装置４に供給されて低温乾留される。これにより、
タール、水並びにガスの混合気体５が発生する。改質炭
は乾留装置４から冷却装ｒｇＬ６に供給されて冷却され
た後にタール吸着装置！ｉ ７に供給される。タール吸
着装置７では、改質炭に混合気体５が接触させられ、こ
れにより改質炭暑こはタールが吸着させられる。タール
を吸着した改質炭８は、その後、例えば、貯炭ヤードに
貯炭され、タール吸着装置ｉｉ７を通過した残りの混合
気体は、気液分離器９に供給されて気液に分離される。In FIG. 1, low-rank coal 1 is pre-dried in a dryer 2 to remove moisture 3 contained therein. The dehydrated low-rank coal is supplied to a carbonization device 4 and subjected to low-temperature carbonization. This results in
A gas mixture 5 of tar, water and gas is generated. The reformed coal is supplied from the carbonization device 4 to the cooling device rgL6, where it is cooled and then transferred to the tar adsorption device! i7. In the tar adsorption device 7, the mixed gas 5 is brought into contact with the reformed coal, thereby causing the reformed coal to adsorb tar. The reformed coal 8 that has adsorbed tar is then stored in a coal storage yard, for example, and the remaining mixed gas that has passed through the tar adsorption device ii7 is supplied to a gas-liquid separator 9 and separated into gas and liquid.
分離された気体１０は、大気へ放出されるか、又は、古
び予備乾燥や低温乾留用熱源の一部として利用される。The separated gas 10 is either released to the atmosphere or used as part of a heat source for pre-drying or low-temperature carbonization.
一方、分離された液体、即ち、熱分解水１１は、貯炭ヤ
ードに貯炭された改質炭８に散水される。On the other hand, the separated liquid, ie, pyrolysis water 11, is sprinkled on reformed coal 8 stored in a coal storage yard.
乾燥機２での予備乾燥は、低品位炭ｌ中の水分の除去が
目的であるので乾燥温度は、１００’Ｃを若干上廻った
程度で、熱分解は生じていないので不純物のない水が得
られる。したがって、そのまま空気中へ放出しても良い
し、また冷却して河川へ放水してもよい。予備乾燥の方
法、特に直接加熱方式の場合には微粉炭が混入すること
もあるが、この場合には従来からある廃水処理方式で処
理すればよい。The purpose of preliminary drying in dryer 2 is to remove moisture from the low-rank coal, so the drying temperature was slightly over 100'C, and no thermal decomposition occurred, so water without impurities was produced. can get. Therefore, it may be released into the air as it is, or it may be cooled and discharged into a river. In the case of pre-drying methods, especially direct heating methods, pulverized coal may be mixed in, but in this case, conventional waste water treatment methods can be used.
乾留装置４での低温乾留は低品位炭の種類（銘柄）によ
っても異なるが本来の目的である含酸素親水基を熱分解
して疎水性の高い高発熱１炭に改質するため壷こは２５
０〜４００°Ｃで熱処理を行う必要が、ある。そして、
タール、水、ガスがおのおの数多程度発生する。この発
生量は熱処理ｉｎ度によって異ってくる。熱分解水の例
を検視的に示すと第２図のごとくになる。この熱分解水
の発生開始温度は約２５０℃であり、４００°Ｃに至る
とは −とんど飽和する。The low-temperature carbonization in the carbonization unit 4 varies depending on the type (brand) of the low-rank coal, but the original purpose is to thermally decompose oxygen-containing hydrophilic groups and reform it into highly hydrophobic and high-heat-generating coal. 25
It is necessary to perform heat treatment at 0 to 400°C. and,
Tar, water, and gas are generated in large quantities. The amount of this generation varies depending on the degree of heat treatment. An example of pyrolyzed water is shown in Fig. 2 when viewed from an autopsy. The temperature at which this pyrolysis water starts to generate is about 250°C, and when it reaches 400°C, it is almost saturated.
次に防塵暑こ必要な散水量について述べる。本発明者等
の研究によると散水によって微粉が凝集し、見掛上粒子
が大きくなると発塵が１Ｅまる。そして見掛上粒子が２
５０μｍ以上になってしまえばほとんど発塵しな（なる
か、発塵しても遠くへ飛散しないので、このような粒子
に凝集するに必要な表面湿分を散水により与えることが
必要となる。Next, we will discuss the amount of watering required for dustproof heat treatment. According to research conducted by the present inventors, fine powder coagulates due to water sprinkling, and when the particles become larger in appearance, the amount of dust generated increases by 1E. And the apparent particle is 2
If the particle size is 50 μm or more, almost no dust is generated (or even if dust is generated, it is not scattered far away, so it is necessary to provide surface moisture necessary for such particles to agglomerate by water sprinkling.
この表面湿分は炭種１こよって異って（る。また改質す
ることによっても変り、減少するが、これらの値は実験
によりめることが可能である。This surface moisture content varies depending on the type of coal. It also changes and decreases due to modification, but these values can be determined by experiment.
改質炭は疎水化されて吸水性は低下するが、それでもあ
る程度の吸水性がある。改質時点では脱水状態に近いの
で上述の防塵に必要な表面湿分に相当するだけ散水して
も、吸収されてしまう。したがって表面湿分に固有水分
を加えた値、すなわち全水分に相当する散水が必要とな
り、この量以下になるように熱分解水の量を押えるため
に熱処理温度を調節すればよい。それ以上の熱分解水が
発生した場合には改質炭暑こ不必要以上の散水を行うか
、廃水処理が必要となってくる。もち論、前者は発熱量
を低下させるので好覧しくない。逆に不足気味のときは
予備乾燥によって生じた水で補えるので特に問題はない
。Although modified coal is made hydrophobic and its water absorbency decreases, it still has a certain degree of water absorption. At the time of modification, it is almost in a dehydrated state, so even if water is sprinkled in an amount corresponding to the surface moisture required for the above-mentioned dust prevention, it will be absorbed. Therefore, it is necessary to sprinkle water corresponding to the surface moisture plus the inherent moisture, that is, the total moisture, and the heat treatment temperature may be adjusted to suppress the amount of pyrolysis water to below this amount. If more pyrolysis water is generated, it will be necessary to spray the reformed coal with more water than necessary or to treat wastewater. Of course, the former is not pleasant to view because it reduces the amount of heat generated. On the other hand, if there is a shortage, it can be supplemented with the water generated during pre-drying, so there is no particular problem.
米国西部より産出された亜瀝青炭（銘柄Ａ）について高
品質化試験を行った。温度３７５℃の低温乾留によって
発生したクール並びに水の量は無水の改質炭に対し、そ
れぞれ８％並ひに１０％であった。また、この改質炭（
タール吸着後）の固有水分は無水の改質炭（タール吸着
後）に対し７係、また防塵暑こ必要な表面湿分は無水の
改質炭（タール吸着後）に対し４％であった。したがっ
て散水に至るまでに必要な水量は無水の改質炭（タール
吸着後）に対し１１チであるのに留出水の量は無水の改
質炭（タール吸着後）に対し９３チしかなかったので、
予備乾燥時発生した水を無水の改質炭（タール吸着後）
に対し１７％を加えて散水を行った。実際にはタール吸
着時、無水の改質炭（タール吸着後）に対し５％の水も
同時に吸着されたので、実際優こ行った散水量は６％で
ある。そして見掛上２５０μｍ以下の微粉が皆無である
ことが確認された。A quality improvement test was conducted on sub-bituminous coal (brand A) produced in the western United States. The amounts of cool and water generated by low-temperature carbonization at a temperature of 375° C. were 8% and 10%, respectively, based on the anhydrous modified coal. In addition, this modified coal (
The inherent moisture content of the anhydrous modified coal (after tar adsorption) was 7% compared to the anhydrous modified coal (after tar adsorption), and the required surface moisture for dustproof heat was 4% compared to the anhydrous modified coal (after tar adsorption). . Therefore, the amount of water required before watering is 11 g for anhydrous reformed coal (after tar adsorption), but the amount of distilled water is only 93 g for anhydrous reformed coal (after tar adsorption). So,
The water generated during pre-drying is converted into anhydrous modified charcoal (after tar adsorption).
Water was added to the water by 17%. In fact, when adsorbing tar, 5% of water was also adsorbed on the anhydrous reformed coal (after tar adsorption), so the actual amount of water sprinkled was 6%. It was confirmed that there was no apparent fine powder of 250 μm or less.
本発明は、以上説明したように、予備乾燥による脱水後
の低品位炭から低温乾留により発生した熱分解水を改質
炭に散水することで、熱分解水の廃水処理を不要にでき
るので、低品位炭の改質質を低減できるという効果があ
る。As explained above, the present invention can eliminate the need for wastewater treatment of pyrolysis water by sprinkling pyrolysis water generated by low-temperature carbonization from low-rank coal after dehydration through preliminary drying onto reformed coal. This has the effect of reducing the reforming of low-rank coal.
第１図は、本発明を実施した低品位炭高品質化プロセス
の一例を示すプロセス・フロー図、第２図は、熱処理温
度と熱分解水の量との関係検視図である。FIG. 1 is a process flow diagram showing an example of a process for improving the quality of low-rank coal according to the present invention, and FIG. 2 is a diagram showing the relationship between heat treatment temperature and amount of pyrolysis water.
Claims (1)
高品質な石炭に改質する方法において、脱水後の前記低
量−位炭から前記低温乾留により発生した熱分解水を前
記高品質な石炭に散水することを特徴とする低品位炭の
高品質化方法。1. In a method of dehydrating low-rank coal by preliminary drying and then reforming it into high-quality coal by low-temperature carbonization, the pyrolysis water generated by the low-temperature carbonization from the dehydrated low-rank coal is converted into the high-quality coal. A method for improving the quality of low-rank coal, which is characterized by sprinkling water on the coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23970383A JPS60133092A (en) | 1983-12-21 | 1983-12-21 | Method of grading up low-quality coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23970383A JPS60133092A (en) | 1983-12-21 | 1983-12-21 | Method of grading up low-quality coal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60133092A true JPS60133092A (en) | 1985-07-16 |
Family
ID=17048663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23970383A Pending JPS60133092A (en) | 1983-12-21 | 1983-12-21 | Method of grading up low-quality coal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60133092A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017008247A (en) * | 2015-06-24 | 2017-01-12 | 株式会社神戸製鋼所 | Method for suppressing dusting of by-produced coal, and method for producing low-dusting by-produced coal |
-
1983
- 1983-12-21 JP JP23970383A patent/JPS60133092A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017008247A (en) * | 2015-06-24 | 2017-01-12 | 株式会社神戸製鋼所 | Method for suppressing dusting of by-produced coal, and method for producing low-dusting by-produced coal |
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