JPH0441198B2 - - Google Patents
Info
- Publication number
- JPH0441198B2 JPH0441198B2 JP17111283A JP17111283A JPH0441198B2 JP H0441198 B2 JPH0441198 B2 JP H0441198B2 JP 17111283 A JP17111283 A JP 17111283A JP 17111283 A JP17111283 A JP 17111283A JP H0441198 B2 JPH0441198 B2 JP H0441198B2
- Authority
- JP
- Japan
- Prior art keywords
- coal
- temperature
- low
- tar
- temperature carbonization
- 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 66
- 238000003763 carbonization Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims 1
- 239000000428 dust Substances 0.000 description 7
- 238000001816 cooling Methods 0.000 description 5
- 239000003476 subbituminous coal Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 238000002407 reforming Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Landscapes
- Coke Industry (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、改質炭の製造方法に係り、特に低品
位炭を防湿性の優れた石炭に改質するのに好適な
改質炭の製造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 producing modified coal, and particularly to a method for producing modified coal suitable for reforming low-rank coal into coal with excellent moisture resistance. It is about the method.
亜瀝青炭や褐炭等の低品位炭を防湿性の優れた
石炭に改質する技術としては、例えば、特公昭57
−115965公報記載のものがある。
As a technology for reforming low-grade coal such as sub-bituminous coal and lignite into coal with excellent moisture resistance, for example,
There is one described in -115965 publication.
この技術は、加熱昇温速度100℃／mm以上で最
終加熱温度300℃〜500℃まで急速加熱し、次いで
冷却降温速度50℃／mm以上で、250℃以下まで急
速冷却して、石炭の熱分解の際に石炭の表面にに
じみ出てる液状のタール物質を発揮させることな
しに固化させて石炭中の細孔を塞ぎ、石炭中の比
表面積を低下させて石炭の吸湿量を低下させるも
のである。 This technology rapidly heats the coal to a final heating temperature of 300 to 500 °C at a heating temperature increase rate of 100 °C/mm or more, and then rapidly cools it to 250 °C or less at a cooling temperature drop rate of 50 °C/mm or more. This method solidifies the liquid tar material that oozes out onto the surface of coal during decomposition, plugging the pores in the coal, reducing the specific surface area of the coal, and reducing the amount of moisture absorbed by the coal. .
しかしながら、石炭のこのような加熱処理によ
り得られたタールは、沸点が200℃以下の低沸点
物質が90％と多い。このため、タールのガス化速
度が速く石炭の表面ににじみ出たタールをガス化
させないで石炭表面に固化させることは非常に困
難であり、したがつて、石炭の吸湿量を低下、す
なわち、防湿性の優れた石炭に改質するのには問
題がある。又、このような加熱処理後の石炭は発
じんし易いため貯炭する場合には散水を実施し発
じんを防止する必要がある。 However, the tar obtained by such heat treatment of coal contains as much as 90% of low-boiling substances with a boiling point of 200°C or less. For this reason, the gasification rate of tar is fast, and it is extremely difficult to solidify the tar on the surface of the coal without gasifying it. There are problems in reforming coal into superior coal. In addition, since the coal after such heat treatment is likely to generate dust, it is necessary to sprinkle water to prevent dust generation when storing the coal.
本発明の目的は、石炭の低温乾留処理により留
出したタールを低温乾留処理された石炭に全量確
実に吸着させると共に、同時に留出した水分を固
有水分以上吸着させることで、石炭を防湿性が優
れ、かつ、発じんしにくい石炭に改質できる改質
炭の製造方法を提供することにある。
The purpose of the present invention is to ensure that the entire amount of tar distilled by low-temperature carbonization treatment of coal is adsorbed to the low-temperature carbonization-treated coal, and at the same time, to make the coal moisture-proof by adsorbing more than the inherent water content of the distilled water. An object of the present invention is to provide a method for producing modified coal that can be modified into coal that is excellent and hardly generates dust.
本発明は、石炭を250℃〜450℃、好ましくは
300℃〜400℃で低温乾留処理した後に、該処理に
より石炭から留出したタール蒸気と水蒸気とでな
り、温度が低温乾留処理温度である混合蒸気を、
温度110℃以下に低温乾留処理後冷却された石炭
と直接接触させることを特徴とするもので、ター
ルを低温乾留処理された石炭に全量確実に吸着さ
せると共に、水分を固有水分以上吸着させるよう
にしたものである。
The present invention provides coal at 250°C to 450°C, preferably
After low-temperature carbonization treatment at 300°C to 400°C, mixed steam consisting of tar vapor and water vapor distilled from coal by the treatment and whose temperature is the low-temperature carbonization treatment temperature,
It is characterized by direct contact with coal that has been cooled after low-temperature carbonization treatment to a temperature of 110°C or less, ensuring that the entire amount of tar is adsorbed to the coal that has been subjected to low-temperature carbonization treatment, and that moisture is absorbed in excess of the inherent moisture content. This is what I did.
本発明の一実施例を図面により説明する。 An embodiment of the present invention will be described with reference to the drawings.
図面で、石炭、例えば低品位炭１は、乾燥装置
２に供給され、ここで、一旦乾燥される。その
後、低温乾留装置３に供給され低温乾留処理され
る。この低温乾留処理時に低品位炭からは、ター
ル蒸気と水蒸気とが留出され、タール蒸気と水蒸
気とでなる混合蒸気４は低温乾留装置３から取出
される。一方、低温乾留装置３からは低温乾留処
理された低品位炭（以下、乾留炭と略）が取出さ
れて冷却装置５に供給される。乾留炭は冷却装置
５で所定温度まで冷却され、冷却された乾留炭は
吸着装置６に供給される。又、吸着装置６には混
合蒸気４が別途供給され、この混合蒸気は所定温
度まで冷却した乾留炭と直接接触させられる。こ
れにより、タール及び水分は乾留炭に吸着し、タ
ール及び水分を吸着した乾留炭（以下、改質炭と
略）７は、吸着装置６から取出され、例えば、貯
炭場（図示省略）に運ばれて貯炭される。 In the drawing, coal, for example low-grade coal 1, is supplied to a drying device 2, where it is once dried. Thereafter, it is supplied to a low temperature carbonization device 3 and subjected to low temperature carbonization treatment. During this low-temperature carbonization treatment, tar vapor and water vapor are distilled from the low-rank coal, and a mixed vapor 4 consisting of tar vapor and water vapor is taken out from the low-temperature carbonization apparatus 3. On the other hand, low-grade coal that has been subjected to low-temperature carbonization treatment (hereinafter abbreviated as carbonization coal) is taken out from the low-temperature carbonization device 3 and supplied to the cooling device 5 . The carbonized carbon is cooled to a predetermined temperature by a cooling device 5, and the cooled carbonized carbon is supplied to an adsorption device 6. Further, mixed steam 4 is separately supplied to the adsorption device 6, and this mixed steam is brought into direct contact with carbonized coal cooled to a predetermined temperature. As a result, the tar and moisture are adsorbed on the carbonized coal, and the carbonized coal (hereinafter referred to as reformed coal) 7 that has absorbed the tar and moisture is taken out from the adsorption device 6 and transported, for example, to a coal storage field (not shown). It is discovered and stored in coal.
この場合、まず、低温乾留処理は、含酸素親水
基が熱分解する250℃〜450℃、好ましくは含酸素
親水基が最も効率よく熱分解する300℃〜400℃で
行う。尚、混合蒸気の温度は、このような低温乾
留処理の温度と必然的に同じとなる。次に冷却装
置５での乾留炭の所定温度は、タールの全量吸着
と共に水分を固有水分以上乾留炭に吸着させる必
要があり、従つて、110℃以下とする。尚、乾留
炭の所定温度が110℃以下の場合は、タールの全
量が乾留炭に吸着し、90℃以下の場合は、タール
と水分の全量が乾留炭に吸着することを確認して
いる。 In this case, first, the low-temperature carbonization treatment is carried out at 250°C to 450°C, where the oxygen-containing hydrophilic groups are thermally decomposed, preferably at 300°C to 400°C, where the oxygen-containing hydrophilic groups are thermally decomposed most efficiently. Note that the temperature of the mixed vapor is necessarily the same as the temperature of such low-temperature carbonization treatment. Next, the predetermined temperature of the carbonized coal in the cooling device 5 is set to 110° C. or less because it is necessary to adsorb the entire amount of tar and to make the carbonized coal adsorb more than the inherent water content. It has been confirmed that when the predetermined temperature of the carbonized coal is 110°C or lower, the entire amount of tar is adsorbed to the carbonized coal, and when the temperature is 90°C or lower, the entire amount of tar and water is adsorbed to the carbonized coal.
一例として、石炭に全水分25％の米国西部亜瀝
青炭を用い図面に示すプロセスに従い実験を実施
した。まず、亜瀝青炭を乾燥した後、400℃で低
温乾留処理した。この処理により亜瀝青炭からは
原炭に対して４％のタール蒸気と、６％の水蒸気
とでなり温度が400℃の混合蒸気を得た。低温乾
留処理された亜瀝青炭をタールと水分の全量が吸
着する温度である90℃に冷却し、その後、温度が
400℃の混合蒸気と直接接触させた。その結果、
タールの全量が確実に吸着すると共に水分が８％
の改質炭を得ることができた。つまり、このとき
の固有水分は６％であるので、表面湿分が約２％
の状態の改質炭を得たことになる。そして、この
程度の表面湿分は発じん防止上必要であり、例え
ば、吸着した水分が固有水分程度であれば、発じ
んし易いため２〜３％の散水が行われる程であ
る。 As an example, an experiment was conducted according to the process shown in the drawing using sub-bituminous coal from the western United States with a total moisture content of 25%. First, sub-bituminous coal was dried and then subjected to low-temperature carbonization treatment at 400°C. Through this treatment, mixed steam with a temperature of 400°C was obtained from the sub-bituminous coal, consisting of 4% tar vapor and 6% water vapor based on the raw coal. Subbituminous coal that has been subjected to low-temperature carbonization is cooled to 90℃, the temperature at which all of the tar and water is adsorbed, and then the temperature is lowered.
Direct contact with mixed steam at 400°C. the result,
The entire amount of tar is reliably adsorbed and the water content is 8%.
of modified coal could be obtained. In other words, the inherent moisture at this time is 6%, so the surface moisture is about 2%.
This means that modified coal in the state of . This level of surface moisture is necessary to prevent dust generation. For example, if the adsorbed moisture is at the level of inherent moisture, it is easy to generate dust, so 2 to 3% watering is performed.
本実施例のような改質炭の製造方法では、次の
ような効果が得られた。 In the method for producing modified coal as in this example, the following effects were obtained.
(1) 乾留炭にタールを全量確実に吸着できると共
に水分を固有水分以上に吸着できるため、石炭
を防湿性が優れ、かつ、発じんしにくい石炭に
改質することができる。(1) Since the carbonized coal can reliably adsorb the entire amount of tar and absorb more water than its own moisture, it is possible to reform coal into coal that has excellent moisture resistance and is less likely to generate dust.
(2) 乾留炭を90℃以下に冷却して混合蒸気と直接
接触させた場合は、タールと水分の全量が乾留
炭に吸着するため、排水が生ぜず、従つて、こ
の部分に対する排水処理を不要にできる。(2) If the carbonized coal is cooled to below 90°C and brought into direct contact with the mixed steam, all of the tar and moisture will be adsorbed to the carbonized coal, so no wastewater will be generated, and therefore, wastewater treatment for this area will not be possible. It can be made unnecessary.
(3) 貯炭時の散水を不要若しくは散水量を大幅に
節減できる。(3) Watering during coal storage is not necessary or the amount of watering can be significantly reduced.
本発明は、以上説明したように石炭を250℃〜
450℃、好ましくは300℃〜400℃で低温乾留処理
した後に、該処理により石炭から留出したタール
蒸気と水蒸気とでなり温度が低温乾留処理温度で
ある混合蒸気を温度110℃以下に冷却された乾留
炭と直接接触させることで、乾留炭にタールを全
量確実に吸着させると共に水分を固存水分以上吸
着できるので、石炭を防湿性が優れ、かつ、発じ
んしにくい石炭に改質できる効果がある。
As explained above, the present invention allows coal to be heated at temperatures between 250°C and
After low-temperature carbonization treatment at 450°C, preferably 300°C to 400°C, the mixed vapor of tar vapor distilled from coal and water vapor, whose temperature is the low-temperature carbonization treatment temperature, is cooled to a temperature of 110°C or less. By bringing it into direct contact with dry-distilled coal, it is possible to ensure that the entire amount of tar is adsorbed to the carbonized coal, and at the same time, it can absorb more water than the solid water, which has the effect of reforming coal into coal that has excellent moisture resistance and is less likely to generate dust. There is.
図面は、本発明を実施した改質炭製造プロセス
の一例を示すフロー図である。
１……低品位炭、３……低温乾留装置、４……
混合蒸気、５……冷却装置、６……吸着装置、７
……改質炭。
The drawing is a flow diagram showing an example of a modified coal manufacturing process in which the present invention is implemented. 1...Low rank coal, 3...Low temperature carbonization equipment, 4...
Mixed steam, 5... Cooling device, 6... Adsorption device, 7
...Reformed coal.
Claims (1)
ないし400℃で低温乾留処理した後に、該処理に
より前記石炭から留出したタール蒸気と水蒸気と
でなり温度が前記低温乾留処理温度である混合蒸
気を、温度110℃以下に低温乾留処理後冷却され
た前記石炭と直接接触させることを特徴とする改
質炭の製造方法。1. Coal at 250℃ to 450℃, preferably 300℃
After low-temperature carbonization treatment at a temperature between 400°C and 400°C, a mixture of tar vapor and water vapor distilled from the coal through the treatment and having a temperature equal to the low-temperature carbonization treatment temperature is cooled to a temperature of 110°C or lower after the low-temperature carbonization treatment. A method for producing modified coal, which comprises bringing the modified coal into direct contact with the above-mentioned coal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17111283A JPS6063294A (en) | 1983-09-19 | 1983-09-19 | Method for producing modified coal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17111283A JPS6063294A (en) | 1983-09-19 | 1983-09-19 | Method for producing modified coal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6063294A JPS6063294A (en) | 1985-04-11 |
| JPH0441198B2 true JPH0441198B2 (en) | 1992-07-07 |
Family
ID=15917189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17111283A Granted JPS6063294A (en) | 1983-09-19 | 1983-09-19 | Method for producing modified coal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6063294A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015015855A1 (en) * | 2013-07-31 | 2015-02-05 | 三菱重工業株式会社 | Coal for boiler fuel |
-
1983
- 1983-09-19 JP JP17111283A patent/JPS6063294A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015015855A1 (en) * | 2013-07-31 | 2015-02-05 | 三菱重工業株式会社 | Coal for boiler fuel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6063294A (en) | 1985-04-11 |
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