JPH0828857A - Method of supplying fuel of low melting point - Google Patents
Method of supplying fuel of low melting pointInfo
- Publication number
- JPH0828857A JPH0828857A JP16113694A JP16113694A JPH0828857A JP H0828857 A JPH0828857 A JP H0828857A JP 16113694 A JP16113694 A JP 16113694A JP 16113694 A JP16113694 A JP 16113694A JP H0828857 A JPH0828857 A JP H0828857A
- Authority
- JP
- Japan
- Prior art keywords
- fuel
- melting point
- low melting
- boiler
- inert gas
- 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
- Gasification And Melting Of Waste (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ボイラ等へプラスチッ
ク等の低融点燃料を投入する燃料の供給方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel supply method for supplying a low melting point fuel such as plastic to a boiler or the like.
【０００２】[0002]
【従来の技術】ボイラにおいてプラスチック等の廃棄物
を燃料として使用する場合、細断・固形化等の前処理を
施した後、重力落下により、炉内へ投入することが一般
的である。2. Description of the Related Art When a waste material such as plastic is used as a fuel in a boiler, it is generally put into the furnace by gravity dropping after pretreatment such as shredding and solidification.
【０００３】従来のプラスチック等の廃棄物を燃料とし
てボイラに供給する方法の１例を、図３に示す。１は燃
料供給管であり、下方の先端に炉内投入口７を有してお
り、細断・固形化等の前処理を施されたプラスチック等
の廃棄物が燃料供給管１内を重力で落下して炉内投入口
７よりボイラの火炉内に投入される。なお、図３中、４
は保温材、５は耐火材、６は燃料供給管１の交換作業を
容易にするために燃料供給管１を取囲んで設けられたガ
イドパイプである。FIG. 3 shows an example of a conventional method of supplying wastes such as plastics as fuel to a boiler. Reference numeral 1 denotes a fuel supply pipe, which has an in-furnace inlet 7 at a lower end thereof, and wastes such as plastics which have been subjected to pretreatment such as shredding and solidification inside the fuel supply pipe 1 by gravity. It falls and is charged into the furnace of the boiler through the charging port 7 in the furnace. In addition, in FIG. 3, 4
Is a heat insulating material, 5 is a refractory material, and 6 is a guide pipe surrounding the fuel supply pipe 1 for facilitating the replacement work of the fuel supply pipe 1.
【０００４】[0004]
【発明が解決しようとする課題】前記の図３に示す燃料
の供給方法におけるように、低融点の燃料を重力落下の
みにより炉内へ投入する際には、高温に加熱される炉内
投入口に低融点燃料が溶融・付着して閉塞を生ずるおそ
れがあり、安定した燃料供給が確保できない。また、閉
塞防止のため、燃料の固形化等の前処理を施すため、専
用の設備が必要となる。As in the fuel supply method shown in FIG. 3, when a low melting point fuel is charged into the furnace only by gravity falling, it is heated to a high temperature in the furnace. Moreover, the low melting point fuel may melt and adhere to cause clogging, and a stable fuel supply cannot be secured. Further, in order to prevent clogging, pretreatment such as solidification of the fuel is performed, so that dedicated equipment is required.
【０００５】またさらに、燃料投入口付近での酸素濃度
が低いボイラにおいて、空気で燃料を搬送して投入する
方法では、投入用空気中の酸素によって燃料が燃焼し、
ボイラ内からの放射熱によって逆火現象が起きるおそれ
がある。Furthermore, in a boiler in which the fuel is introduced by air in the boiler where the oxygen concentration near the fuel inlet is low, the fuel is burned by the oxygen in the inlet air,
Radiant heat from inside the boiler may cause flashback.
【０００６】本発明は、以上の問題点を解決することが
できる燃料の供給方法を提供しようとするものである。The present invention is intended to provide a fuel supply method capable of solving the above problems.
【０００７】[0007]
【課題を解決するための手段】本発明の低融点燃料の供
給方法は、次の手段を講じた。 （１）燃焼部に低融点燃料を投入する際に、前記低融点
燃料の融点以下の温度の不活性ガスを前記低融点燃料に
混合することを特徴とする。 （２）前記（１）の低融点燃料の供給方法において、低
融点燃料の燃焼部への投入部を水冷することを特徴とす
る。The method of supplying the low melting point fuel of the present invention takes the following means. (1) When the low melting point fuel is charged into the combustion section, an inert gas having a temperature equal to or lower than the melting point of the low melting point fuel is mixed with the low melting point fuel. (2) In the low melting point fuel supply method of (1), the low melting point fuel is charged into the combustion section with water.
【０００８】[0008]
【作用】前記本発明（１）においては、燃焼部に低融点
燃料を投入する際に前記低融点燃料の融点以下の温度の
低温の不活性ガスを低融点燃料に混合することによって
燃料が冷却され、燃焼部への投入部での低融点燃料の溶
融付着を防止することができる。また、不活性ガスを使
用することにより、燃焼部への投入部における逆火現象
を防止することができる。In the present invention (1), when the low-melting fuel is injected into the combustion section, the low-melting fuel is mixed with a low temperature inert gas having a temperature lower than the melting point of the low-melting fuel to cool the fuel. Therefore, it is possible to prevent the low melting point fuel from melting and adhering at the charging portion to the combustion portion. Further, by using the inert gas, it is possible to prevent the flashback phenomenon in the charging section to the combustion section.
【０００９】前記本発明（２）においては、前記本発明
（１）の作用に加えて、低融点燃料の燃焼部への投入部
が水冷されることによって、燃焼部への投入部での低融
点燃料の溶融・付着を更に効果的に防止することができ
る。In the present invention (2), in addition to the operation of the present invention (1), the low-melting-point fuel injection section is cooled by water so that the low-melting-point injection section can be cooled. Melting / adhesion of the melting point fuel can be prevented more effectively.
【００１０】[0010]
【実施例】本発明の一実施例を、図１及び図２によって
説明する。本実施例は、製紙プラント等より排出される
プラスチックを多く含み低融点（融点１００〜１１０
℃）のミルクカートン残渣を燃料としてボイラへ供給す
る方法に係り、ボイラへ燃料を供給する部分が図１に示
されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. This embodiment contains a large amount of plastic discharged from a paper manufacturing plant or the like and has a low melting point (melting point 100 to 110).
Fig. 1 shows a portion for supplying the fuel to the boiler, which is related to the method for supplying the milk carton residue (° C) as a fuel to the boiler.
【００１１】図１に示される部分は、図３に示される部
分に以下説明するものを付加したものであり、図１にお
いて図３におけると同一の部分には同一の符号を付し、
その説明を省略する。The portion shown in FIG. 1 is obtained by adding the following portion to the portion shown in FIG. 3. In FIG. 1, the same portions as those in FIG.
The description is omitted.
【００１２】本実施例では、燃料供給管１のまわりに水
冷部が設けられており、水冷部は、燃料供給管１の上方
の部分のまわりに設けられ冷却水入口２を備えたスパイ
ラル冷却管９と、同スパイラル冷却管９に接続されスパ
イラル冷却管９より下方の燃料供給管１の部分のまわり
に設けられ冷却水出口８をもつ水冷ジャケット１０より
なり、水冷ジャケット１０は保温材４と耐火材５を貫通
して炉内投入口７まで延びている。また、燃料供給管１
の上方の部分には、不活性ガス混合管３が開口してお
り、同不活性ガス混合管３には、後記するように、熱交
換して温度を下げた上脱硝装置を出たミルクカートン残
渣の融点より低温の５０〜６０℃の温度のボイラの排ガ
スの一部が不活性ガスとして供給されるようになってい
る。In this embodiment, a water cooling unit is provided around the fuel supply pipe 1, and the water cooling unit is provided around the upper portion of the fuel supply pipe 1 and has a spiral cooling pipe having a cooling water inlet 2. 9 and a water cooling jacket 10 connected to the spiral cooling pipe 9 and provided around the fuel supply pipe 1 below the spiral cooling pipe 9 and having a cooling water outlet 8. The water cooling jacket 10 and the heat insulating material 4 and fireproofing It penetrates through the material 5 and extends to the furnace inlet 7. Also, the fuel supply pipe 1
The inert gas mixing pipe 3 is opened in the upper part of the milk carton which has exited the upper denitration device whose temperature has been reduced by heat exchange, as will be described later. A part of the exhaust gas of the boiler having a temperature of 50 to 60 ° C. which is lower than the melting point of the residue is supplied as an inert gas.
【００１３】本実施例では、低融点の燃料としてのミル
クカートン残渣は、燃料供給管１に供給された後落下
し、その過程で不活性ガス混合管３より熱交換後のミル
クカートン残渣の融点より温度が低い低温ボイラ排ガス
と混合して冷却された上炉内投入口７へ導かれる。燃料
供給管１は水冷ジャケットによって冷却されている。In this embodiment, the milk carton residue as a low melting point fuel is supplied to the fuel supply pipe 1 and then drops, and in the process, the melting point of the milk carton residue after heat exchange from the inert gas mixing pipe 3. It is introduced into the upper furnace inflow port 7 that is cooled by mixing with the low temperature boiler exhaust gas having a lower temperature. The fuel supply pipe 1 is cooled by a water cooling jacket.
【００１４】図２は、前記不活性ガスとして低温ボイラ
排ガスを使用する排ガス系統図である。ボイラ１８を出
た排ガスはサイクロン１９で粗脱じんされ、エアヒータ
２０で熱交換され、バグフィルタ２１で脱じんされた後
誘引ファン２２に達する。そして、排ガスは脱硝装置２
３を通過後煙突２４へ排出されると共に、その一部は排
ガスアシスト用ファン２５により昇圧され、不活性ガス
混合管３を経て燃料供給管１内に導かれ、温度５０〜６
０℃の低温のボイラ排ガスがミルクカートン残渣と混合
される。FIG. 2 is an exhaust gas system diagram in which low temperature boiler exhaust gas is used as the inert gas. The exhaust gas discharged from the boiler 18 is roughly dedusted by the cyclone 19, heat-exchanged by the air heater 20, dedusted by the bag filter 21, and then reaches the induction fan 22. Then, the exhaust gas is denitration device 2
After passing through 3, the gas is discharged to the stack 24, and a part of the gas is boosted by the exhaust gas assisting fan 25 and introduced into the fuel supply pipe 1 through the inert gas mixing pipe 3 to reach the temperature of 50 to 6
Cold boiler flue gas at 0 ° C is mixed with milk carton residue.
【００１５】以上の通り、本実施例では、燃焼部である
ボイラ火炉に供給される低融点のミルクカートン残渣
は、燃料供給管１内においてミルクカートン残渣の融点
より低温の不活性ガスであるボイラ排ガスと混合され、
かつ、燃料供給管１内においてスパイラル冷却管９と水
冷ジャケット１０によって水冷されることによって、ミ
ルクカートン残渣が炉内投入口７付近で溶融・付着する
ことを防止することができる。As described above, in the present embodiment, the low melting point milk carton residue supplied to the boiler furnace, which is the combustion section, is an inert gas having a temperature lower than the melting point of the milk carton residue in the fuel supply pipe 1 in the boiler. Mixed with exhaust gas,
In addition, the spiral cooling pipe 9 and the water cooling jacket 10 in the fuel supply pipe 1 cool the water to prevent the milk carton residue from melting and adhering in the vicinity of the charging port 7 in the furnace.
【００１６】また、不活性ガスであるボイラ排ガスがミ
ルクカートン残渣と共に炉内投入口７よりボイラ火炉に
導入されるので、炉内投入口７での逆火現象を防止する
ことができる。Further, since the boiler exhaust gas, which is an inert gas, is introduced into the boiler furnace through the furnace charging port 7 together with the milk carton residue, it is possible to prevent the flashback phenomenon at the furnace charging port 7.
【００１７】また更に、以上のように低融点燃料の溶融
・付着が防止されるために、同燃料の前処理は細断程度
で充分であり、固形化等の特別な処理が不必要になる。Furthermore, in order to prevent the low melting point fuel from melting and adhering as described above, the pretreatment of the fuel is sufficient to be shredded, and special treatment such as solidification becomes unnecessary. .
【００１８】[0018]
【発明の効果】本発明では、低融点燃料の燃焼部への投
入時に低融点燃料の融点以下の温度の不活性ガスを低融
点燃料に混合し、また、前記低融点燃料の燃焼部への投
入部を水冷することによって、低融点燃料の溶融・付着
を防止して燃料の燃焼部への投入部の閉塞を防ぐことが
でき、安定した燃料の供給を行うことができる。According to the present invention, an inert gas having a temperature lower than the melting point of the low melting point fuel is mixed with the low melting point fuel when the low melting point fuel is introduced into the combustion section, and the low melting point fuel is supplied to the combustion section. By water-cooling the charging part, it is possible to prevent the low melting point fuel from melting and adhering, to prevent the charging part from clogging the charging part of the fuel, and to stably supply the fuel.
【００１９】また、燃焼部に投入される低融点燃料に不
活性ガスを混合しているために、燃焼部への投入部にお
ける逆火現象を防止することができる。Further, since the low-melting-point fuel that is charged into the combustion section is mixed with the inert gas, it is possible to prevent the flashback phenomenon in the charging section into the combustion section.
【００２０】また更に、低融点燃料の溶融・付着が以上
の通り防止されるため、同燃料の前処理は細断程度で充
分であり、固形化等の特別な処理が不必要となる。Furthermore, since the melting and adhesion of the low melting point fuel is prevented as described above, the pretreatment of the fuel is sufficient to be shredded, and special treatment such as solidification is unnecessary.
【図１】本発明の一実施例に係る燃料の供給方法の概念
図である。FIG. 1 is a conceptual diagram of a fuel supply method according to an embodiment of the present invention.
【図２】同実施例に用いられるボイラの排ガス系統図で
ある。FIG. 2 is an exhaust gas system diagram of a boiler used in the embodiment.
【図３】従来の燃料の供給方法の１例の概念図である。FIG. 3 is a conceptual diagram of an example of a conventional fuel supply method.
１ 燃料供給管 ２ 冷却水入口 ３ 不活性ガス混合管 ４ 保温材 ５ 耐火材 ６ ガイドパイプ ７ 炉内投入口 ８ 冷却水出口 ９ スパイラル水冷管 １０ 水冷ジャケット １８ ボイラ １９ サイクロン ２０ エアヒータ ２１ バグフィルタ ２２ 誘引ファン ２３ 脱硝装置 ２４ 煙突 ２５ 排ガスアシスト用ファン 1 Fuel Supply Pipe 2 Cooling Water Inlet 3 Inert Gas Mixing Pipe 4 Heat Insulating Material 5 Refractory Material 6 Guide Pipe 7 Reactor Inlet 8 Cooling Water Outlet 9 Spiral Water Cooling Pipe 10 Water Cooling Jacket 18 Boiler 19 Cyclone 20 Air Heater 21 Bag Filter 22 Induction Fan 23 Denitration device 24 Chimney 25 Exhaust gas assist fan
Claims (2)
記低融点燃料の融点以下の温度の不活性ガスを前記低融
点燃料に混合することを特徴とする低融点燃料の供給方
法。1. A method of supplying a low melting point fuel, comprising mixing an inert gas having a temperature equal to or lower than a melting point of the low melting point fuel with the low melting point fuel when the low melting point fuel is injected into the combustion section.
ることを特徴とする請求項１に記載の低融点燃料の供給
方法。2. The method for supplying a low melting point fuel according to claim 1, wherein a portion for introducing the low melting point fuel into the combustion section is water-cooled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16113694A JPH0828857A (en) | 1994-07-13 | 1994-07-13 | Method of supplying fuel of low melting point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16113694A JPH0828857A (en) | 1994-07-13 | 1994-07-13 | Method of supplying fuel of low melting point |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0828857A true JPH0828857A (en) | 1996-02-02 |
Family
ID=15729284
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16113694A Pending JPH0828857A (en) | 1994-07-13 | 1994-07-13 | Method of supplying fuel of low melting point |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0828857A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100386471B1 (en) * | 2000-10-31 | 2003-06-02 | 한국에너지기술연구원 | An auxiliary apparatus for particle supplement & particle feeding method as such for the reactor with high pressure and high temperature |
| JP2009532657A (en) * | 2006-04-06 | 2009-09-10 | ピーター スタイン | Hybrid supply mechanism |
-
1994
- 1994-07-13 JP JP16113694A patent/JPH0828857A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100386471B1 (en) * | 2000-10-31 | 2003-06-02 | 한국에너지기술연구원 | An auxiliary apparatus for particle supplement & particle feeding method as such for the reactor with high pressure and high temperature |
| JP2009532657A (en) * | 2006-04-06 | 2009-09-10 | ピーター スタイン | Hybrid supply mechanism |
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