JPS62215691A - Method for drying coal by using waste heat of coke oven - Google Patents
Method for drying coal by using waste heat of coke ovenInfo
- Publication number
- JPS62215691A JPS62215691A JP61057373A JP5737386A JPS62215691A JP S62215691 A JPS62215691 A JP S62215691A JP 61057373 A JP61057373 A JP 61057373A JP 5737386 A JP5737386 A JP 5737386A JP S62215691 A JPS62215691 A JP S62215691A
- Authority
- JP
- Japan
- Prior art keywords
- heat
- coal
- heat exchanger
- dryer
- flue
- 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
- 239000003245 coal Substances 0.000 title claims abstract description 29
- 239000000571 coke Substances 0.000 title claims abstract description 12
- 238000001035 drying Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 title claims description 7
- 239000002918 waste heat Substances 0.000 title abstract 2
- 238000011084 recovery Methods 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 9
- 239000003546 flue gas Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 abstract description 8
- 239000002912 waste gas Substances 0.000 abstract 3
- 239000007788 liquid Substances 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Landscapes
- Drying Of Solid Materials (AREA)
- Coke Industry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、コークス炉排熱を利用して石炭を乾燥する方
法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of drying coal using coke oven exhaust heat.
コークス炉煙道排ガス温度は約２００℃と比較的低いが
、これを熱媒油で排ガス温度を約１００℃までに熱回収
し、その熱媒油を乾燥機内のパイプ。The temperature of the coke oven flue exhaust gas is relatively low at approximately 200°C, but the heat is recovered using heat transfer oil to bring the exhaust gas temperature down to approximately 100°C, and the heat transfer oil is transferred to the pipe inside the dryer.
円板等の伝熱体に通し、その伝熱体を介して石炭を乾燥
する方式がある（特開昭５０−１４０９５０号）。There is a method in which coal is passed through a heat transfer body such as a disk and dried through the heat transfer body (Japanese Patent Laid-Open No. 140950/1983).
しかしながら、この方式においては排ガス温度゛を約１
００℃まで下げるために、乾燥機出口の熱媒油を、低温
度の排ガス温度より更に低い７０〜９０℃にする必要が
ある。However, in this method, the exhaust gas temperature
In order to lower the temperature to 00°C, it is necessary to set the heat transfer oil at the dryer outlet to 70 to 90°C, which is lower than the low-temperature exhaust gas temperature.
そこで、熱交換容量を大きくする必要から、乾燥機の伝
熱面積が比較的大きくなり、またそれに応じて伝熱管の
腐食速度も大きくなる。Therefore, since it is necessary to increase the heat exchange capacity, the heat transfer area of the dryer becomes relatively large, and the corrosion rate of the heat transfer tubes increases accordingly.
本発明は、このような問題点に鑑み、乾燥機を大型化す
ることな（、しかも煙道排ガス顕熱回収量を増加させる
ことを目的とする。In view of these problems, the present invention aims to increase the amount of sensible heat recovered from the flue gas without increasing the size of the dryer.
本発明は、この目的を達成すべく、煙道排ガス顕熱回収
用熱交換器と石炭乾燥機との間で熱媒体を循環させるこ
とにより、コークス炉排熱を使用して石炭を乾燥する方
法において、前記熱交換器と前記石炭乾燥機との間に補
助的な熱交換器を設け、石炭乾燥機から排出される熱媒
体を冷却することを特徴とする特
（作用〕
この補助的な熱交換器を設けることによって、乾燥機か
ら排出される熱媒体の温度を高くすることが可能となる
。これは、乾燥機の伝熱面積の減少を許容し、伝熱管表
面温度上昇に併い石炭付着の減少をもたらすことにもな
る。In order to achieve this object, the present invention provides a method for drying coal using coke oven exhaust heat by circulating a heat medium between a flue gas sensible heat recovery heat exchanger and a coal dryer. In this method, an auxiliary heat exchanger is provided between the heat exchanger and the coal dryer to cool the heat medium discharged from the coal dryer. By providing an exchanger, it is possible to increase the temperature of the heat medium discharged from the dryer.This allows the heat transfer area of the dryer to decrease, and as the heat transfer tube surface temperature rises, the temperature of the heat medium discharged from the dryer increases. It will also result in reduced adhesion.
また、補助的な熱交換器の付設は、熱媒体の温度を下げ
る結果として、煙道排ガスからの熱回収量の増加をもた
らす作用を呈する。Additionally, the provision of an auxiliary heat exchanger has the effect of lowering the temperature of the heat transfer medium, thereby increasing the amount of heat recovered from the flue gas.
第２図は、煙道排ガス顕熱回収を利用した従来の石炭乾
燥システムを示す。FIG. 2 shows a conventional coal drying system that utilizes flue gas sensible heat recovery.
コークス炉の煙道排ガスｄは約２００℃の温度となって
おり、煙道熱交換器２内で熱媒油すにより約１００℃に
冷却される。熱媒油すはその排ガス温度より２０〜４０
℃低い温度で導入される。ここでは、８０°Ｃとする。The flue gas d of the coke oven has a temperature of about 200° C., and is cooled to about 100° C. in the flue heat exchanger 2 by a heat transfer oil bath. The temperature of the heat transfer oil is 20 to 40 degrees higher than the exhaust gas temperature.
℃ introduced at a lower temperature. Here, it is assumed to be 80°C.
熱媒油すは煙道熱交換器２で昇温した後、次の熱媒加熱
装置３で更に昇温し、次いで乾燥Ｊａ１に入る。熱媒加
熱装置３はコークス炉発生ガス顕熱回収装置、助燃装置
等からなっている。After the heat medium oil bath is heated in the flue heat exchanger 2, it is further heated in the next heat medium heating device 3, and then enters the drying Ja1. The heat medium heating device 3 includes a coke oven gas sensible heat recovery device, an auxiliary combustion device, and the like.
これに対して、本発明に従うシステムは、第１図に示す
ような構成をとる。In contrast, the system according to the present invention has a configuration as shown in FIG.
乾燥機１と煙道熱交換器２との間に、低温熱利用のため
の中間熱交換器４を設置する。中間熱交換器４の設置に
よって、熱媒油すの温度は乾燥機１の出側を高くすると
、或いは煙道熱交換器２の入側を低くすることができる
。前者の場合、乾燥機１の伝熱面積が減少するとともに
、伝熱体表面の温度上昇によって石炭付着が減少する。An intermediate heat exchanger 4 for utilizing low-temperature heat is installed between the dryer 1 and the flue heat exchanger 2. By installing the intermediate heat exchanger 4, the temperature of the heat medium oil can be raised on the outlet side of the dryer 1 or lowered on the inlet side of the flue heat exchanger 2. In the former case, the heat transfer area of the dryer 1 decreases, and coal adhesion decreases due to the temperature increase on the surface of the heat transfer body.
後者の場合は、煙道排ガス顕熱回収量の増加が可能にな
る。また、中間熱交換器４で流体ｅに与えられた熱量は
、他の用途に有効に利用される。In the latter case, it becomes possible to increase the amount of flue gas sensible heat recovery. Further, the amount of heat given to the fluid e by the intermediate heat exchanger 4 is effectively used for other purposes.
流体ｅとしてボイラ用給水を用いた場合を第１表に示す
。Table 1 shows the case where boiler feed water is used as fluid e.
本例では、ボイラ用給水を中間熱交換器４で１５℃から
６５℃に昇温する。この場合、乾燥機１の伝熱面積は伝
熱量が同一であるにかかわらず、従来（７）２０５０ｒ
ｄから１５３０ｒｒＦに大幅に減少する。In this example, the boiler feed water is heated from 15°C to 65°C by the intermediate heat exchanger 4. In this case, the heat transfer area of the dryer 1 is 2050 r
d to 1530rrF.
他の例として、流体ｅにコークス炉燃料ガス。Another example is coke oven fuel gas in fluid e.
燃焼空気と乾燥機用キャリアガスを用い、その昇温によ
ってコークス炉消費熱量、乾燥機消費熱量を減少させる
こともできる等広く応用できる。By using combustion air and a carrier gas for dryers, it can be widely applied, such as by increasing the temperature of the air, reducing the amount of heat consumed in coke ovens and dryers.
第 １ 表
〔発明の効果〕
以上述べたとおり本発明によれば、補助的な熱交換器を
付設することによって、石炭乾燥器の熱交換容量を軽減
することが可能となる。また、石炭乾燥器から排出され
る熱媒体の温度を高くすることができることから、石炭
乾燥機の伝熱管に付着する石炭の量も少なくなる。Table 1 [Effects of the Invention] As described above, according to the present invention, by attaching an auxiliary heat exchanger, it is possible to reduce the heat exchange capacity of the coal dryer. Furthermore, since the temperature of the heat medium discharged from the coal dryer can be increased, the amount of coal adhering to the heat transfer tubes of the coal dryer is also reduced.
さらには、温度低下した熱媒体が煙道排ガス顕熱回収用
熱交喚機に送られるので、煙道排ガスからの熱回収量も
増加する。Furthermore, since the heat medium whose temperature has decreased is sent to the heat exchanger for flue gas sensible heat recovery, the amount of heat recovered from the flue gas also increases.
第１図は本発明に従う熱媒体循環系統を示し、第２図は
従来技術の熱媒体循環系統を示す。FIG. 1 shows a heat medium circulation system according to the present invention, and FIG. 2 shows a heat medium circulation system according to the prior art.
Claims (1)
で熱媒体を循環させることにより、コークス炉排熱を使
用して石炭を乾燥する方法において、前記熱交換器と前
記石炭乾燥機との間に補助的な熱交換器を設け、石炭乾
燥機から排出される熱媒体を冷却することを特徴とする
コークス炉排熱を利用した石炭乾燥方法。1. A method of drying coal using coke oven exhaust heat by circulating a heat medium between a flue gas sensible heat recovery heat exchanger and a coal dryer, wherein the heat exchanger and the coal A coal drying method using coke oven exhaust heat, which is characterized by providing an auxiliary heat exchanger between the coal dryer and cooling the heat medium discharged from the coal dryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61057373A JPS62215691A (en) | 1986-03-15 | 1986-03-15 | Method for drying coal by using waste heat of coke oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61057373A JPS62215691A (en) | 1986-03-15 | 1986-03-15 | Method for drying coal by using waste heat of coke oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62215691A true JPS62215691A (en) | 1987-09-22 |
Family
ID=13053789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61057373A Pending JPS62215691A (en) | 1986-03-15 | 1986-03-15 | Method for drying coal by using waste heat of coke oven |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62215691A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8062410B2 (en) * | 2004-10-12 | 2011-11-22 | Great River Energy | Apparatus and method of enhancing the quality of high-moisture materials and separating and concentrating organic and/or non-organic material contained therein |
| CN103105058A (en) * | 2011-11-14 | 2013-05-15 | 湖南省冶金规划设计院 | Rotary kiln combustion system utilizing low heating value coal gas |
| US20140141381A1 (en) * | 2004-10-12 | 2014-05-22 | Great River Energy | Method of enhancing the quality of high-moisture materials using system heat sources |
-
1986
- 1986-03-15 JP JP61057373A patent/JPS62215691A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8062410B2 (en) * | 2004-10-12 | 2011-11-22 | Great River Energy | Apparatus and method of enhancing the quality of high-moisture materials and separating and concentrating organic and/or non-organic material contained therein |
| US20140141381A1 (en) * | 2004-10-12 | 2014-05-22 | Great River Energy | Method of enhancing the quality of high-moisture materials using system heat sources |
| CN103105058A (en) * | 2011-11-14 | 2013-05-15 | 湖南省冶金规划设计院 | Rotary kiln combustion system utilizing low heating value coal gas |
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