JP2863064B2 - Heating furnace for pyrolysis of plastics - Google Patents
Heating furnace for pyrolysis of plasticsInfo
- Publication number
- JP2863064B2 JP2863064B2 JP16300293A JP16300293A JP2863064B2 JP 2863064 B2 JP2863064 B2 JP 2863064B2 JP 16300293 A JP16300293 A JP 16300293A JP 16300293 A JP16300293 A JP 16300293A JP 2863064 B2 JP2863064 B2 JP 2863064B2
- Authority
- JP
- Japan
- Prior art keywords
- combustion chamber
- straight body
- heating
- pyrolysis
- plastics
- 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 - Fee Related
Links
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
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Processing Of Solid Wastes (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、プラスチックスを熱分
解あるいは熱分解・接触分解して、主に低沸点炭化水素
油を得るために用いられる管式加熱炉に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular heating furnace which is used for pyrolysis or pyrolysis / catalytic cracking of plastics to obtain mainly a low-boiling hydrocarbon oil.
【０００２】[0002]
【従来の技術】廃棄プラスチックスを熱分解して低分子
量の炭化水素とするための方法として例えば、特開平２
−２９４９２号公報に記載されているように、プラスチ
ックスの破砕物を押出機を用いて加熱し、軟化溶融しつ
つ連続的に熱分解反応槽に供給して、ここで発生した気
化物を接触分解槽において低分子化する方法がある。2. Description of the Related Art As a method for thermally decomposing waste plastics into hydrocarbons having a low molecular weight, for example, Japanese Patent Laid-Open No.
As described in JP-A-29492, a crushed product of plastics is heated using an extruder, and is continuously supplied to a pyrolysis reaction tank while being softened and melted. There is a method of reducing the molecular weight in a decomposition tank.
【０００３】この熱分解反応槽内における熱分解を行う
ためには、プラスチックス溶融体を３６０℃〜４３０℃
の高温に維持する必要があり、加熱炉として対流伝熱部
と輻射伝熱部とからなる構造のものが使用され、この高
温維持はプラスチックス溶融体を加熱炉内に配置した加
熱管内を通すことによって行われている。[0003] In order to carry out the thermal decomposition in this thermal decomposition reaction tank, the plastics melt is heated at 360 ° C to 430 ° C.
It is necessary to maintain a high temperature, and a heating furnace having a structure consisting of a convection heat transfer section and a radiant heat transfer section is used. This high temperature maintenance is performed by passing a plastics melt through a heating tube arranged in the heating furnace. It is done by that.
【０００４】ところが、この構造の加熱炉においては、
加熱管内の炭化水素油の湿度が３６０℃以下であれば、
加熱管内にコーキングをおこすことが比較的少く操業で
きるものの、炭化水素油の温度が前記熱分解反応槽での
適性温度範囲である３６０℃以上では加熱管内にコーキ
ングが発生し、これが沈積して長期連続運転に耐えられ
ない。However, in a heating furnace having this structure,
If the humidity of the hydrocarbon oil in the heating tube is 360 ° C or less,
Although caulking in the heating pipe can be performed relatively little, coking occurs in the heating pipe when the temperature of the hydrocarbon oil is 360 ° C. or more, which is the appropriate temperature range in the thermal cracking reaction tank, and the coking is deposited, and the Can not stand continuous operation.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、かかる従来
の破棄プラスチックスを熱分解して低分子量の炭化水素
とするため加熱炉の問題を解消するもので、炭化水素油
の温度が３６０℃以上でかつ加熱管内にコーキングを起
こすことなく長期に安定して運転が可能な、プラスチッ
クスの熱分解のための加熱炉の提供を目的とする。SUMMARY OF THE INVENTION The present invention solves the problem of a heating furnace for thermally decomposing such conventional discarded plastics into low-molecular-weight hydrocarbons. An object of the present invention is to provide a heating furnace for thermal decomposition of plastics, which can operate stably for a long time without causing caulking in the heating tube.
【０００６】[0006]
【課題を解決するための手段】本発明は、かかる加熱管
内のコーキングは、管の表面温度が、内部の油本体の温
度より著しく高くなり、管体の内表面でＣｍＨｍ→ｎＣ
＋ｍ／２Ｈ2 の反応が生じることに起因するもので、か
かる加熱管内のコーキングは、輻射伝熱部を廃し、対流
伝熱部のみの構造にすることによって避け得るという知
見に基づいて完成した。SUMMARY OF THE INVENTION According to the present invention, the coking in such a heating tube is such that the surface temperature of the tube becomes significantly higher than the temperature of the oil body inside, and CmHm → nC
+ In which the reaction of m / 2H 2 is due to occur, coking of such heating tube is radiation heat transfer section and the waste was completed based on the finding that be avoided by employing the structure of the convective heat transfer section only.
【０００７】すなわち、本発明のプラスチックスの熱分
解のための加熱炉は、端部に加熱バーナを設けた水平の
燃焼室と、同燃焼室から垂直に立ち上がった直同部とを
有するＬ型構造をなし、前記燃焼室中央付近に複数の耐
火物柱を配置すると共に、前記直胴部に加熱管群を納め
てなり、且つ前記直胴部の上方から吸引した排ガスを前
記燃焼室のバーナ近傍に導入するための排ガス導入ダク
トを前記直胴部の上方から前記バーナ近傍の燃焼室にわ
たって設けたものである。That is, the heating furnace for pyrolysis of plastics according to the present invention is an L-shaped furnace having a horizontal combustion chamber provided with a heating burner at an end, and a straight vertical section rising vertically from the combustion chamber. A plurality of refractory pillars are arranged in the vicinity of the center of the combustion chamber, and a heating tube group is accommodated in the straight body, and the exhaust gas sucked from above the straight body is burned into the burner of the combustion chamber. An exhaust gas introduction duct for introduction into the vicinity is provided from above the straight body portion to a combustion chamber near the burner.
【０００８】この燃焼室内に設けた耐火物柱としては、
直胴部上方から吸引した排ガスと加熱バーナより発生し
た燃焼排ガスを充分混合させるためと、直胴部に納めら
れた加熱管群への輻射伝熱を遮るために複数の柱状の耐
火物によって形成するのが都合がよい。[0008] The refractory pillars provided in the combustion chamber include:
Formed with multiple column-shaped refractories to mix the exhaust gas sucked from the upper part of the straight body with the combustion exhaust gas generated from the heating burner sufficiently, and to block radiant heat transfer to the heating tube group housed in the straight body part It is convenient to do so.
【０００９】[0009]
【作用】水平の燃焼室中央部に配置した障壁体により、
燃焼室をバーナ側の燃焼室混合部と直胴部側の対流部に
分け、直胴部上方からの熱交換後の低温になった排ガス
を燃焼室混合部内に導入することによって、燃焼室混合
部内温度を常時６００℃以下にすることができる。さら
に、加熱管を配置した直胴部へは、燃焼室の障壁体を通
過した充分混合された燃焼排ガスが通り、これによって
加熱管は加熱され、管体を部分的に過熱することはない
ので、管内を通る熱分解油３６０℃〜４３０℃の適温に
維持すると共に、コーキングを発生することがない。[Function] The barrier located at the center of the horizontal combustion chamber,
The combustion chamber is divided into a combustion chamber mixing section on the burner side and a convection section on the straight body section, and the low temperature exhaust gas after heat exchange from above the straight body section is introduced into the combustion chamber mixing section. The internal temperature can always be kept at 600 ° C. or lower. Furthermore, the well-mixed flue gas that has passed through the barrier of the combustion chamber passes through the straight body where the heating tube is arranged, so that the heating tube is heated and does not partially overheat the tube. The pyrolysis oil passing through the pipe is maintained at an appropriate temperature of 360 ° C to 430 ° C, and coking is not generated.
【００１０】[0010]
【実施例】図１は、本発明の加熱炉を適用した処理プロ
セスを示す。FIG. 1 shows a treatment process to which a heating furnace according to the present invention is applied.
【００１１】同図において、プラスチックス廃材の破砕
物Ａは、押出機１に加熱状態で押し出され、溶融プラス
チックスＢとして原料混合槽２に供給され、ここで、熱
分解槽３より送られてくる熱分解油Ｃと混合される。充
分混合した溶融プラスチックスと熱分解油との混合物Ｄ
は熱分解槽３へ送られる。この混合物Ｄは、加熱管４に
よって熱分解槽３と加熱炉１０との間を循環し、加熱炉
１０において加熱されて熱分解槽３において分解され
て、低沸点炭化水素ガスＥとして回収される。In FIG. 1, a crushed product A of waste plastics is extruded in a heated state into an extruder 1 and supplied to a raw material mixing tank 2 as molten plastics B, where it is sent from a pyrolysis tank 3. It is mixed with the pyrolysis oil C that comes. Mixture D of well-mixed molten plastics and pyrolysis oil
Is sent to the thermal decomposition tank 3. This mixture D is circulated between the pyrolysis tank 3 and the heating furnace 10 by the heating pipe 4, heated in the heating furnace 10, decomposed in the pyrolysis tank 3, and recovered as a low-boiling hydrocarbon gas E. .
【００１２】図２は、上記図１に示す加熱炉１０の構造
を示す図である。FIG. 2 is a view showing the structure of the heating furnace 10 shown in FIG.
【００１３】同加熱炉１０は、一端面にバーナ１１が設
けた耐火物ライニング１２を施した水平な燃焼室１３
と、その燃焼室１３の端部に立ち上がった直胴部１４と
を有するＬ字形構造を有する。燃焼室１３の中央には、
複数の耐火物柱によって形成された障壁柱１５が配置さ
れており、バーナからの火炎が直接届くのを防ぐととも
に、輻射熱が直胴部１４へ入り込むのを防いでいる。障
壁柱１５は、循環する燃焼排ガスが燃焼室１３で、高温
のバーナ火炎と充分よく混合されて部分的に高温ガスが
偏ったりしないようにする機能も持っている。また、直
胴部１４には、溶融プラスチックスと熱分解油の混合物
を導入し、加熱するための加熱管４が配置されている。
この加熱管４は、許容平均伝熱率が裸管ベースで７００
０ｋｃａｌ／ｍ2 ｈｒ以下であるように設計された加熱
管として形成され、直胴部１４内に配置されている。こ
の加熱管４は、燃焼室の障壁柱１５を通過した高温ガス
の対流によってのみ加熱され、火炎が直接加熱管４に到
達することがないので、その管体４の表面は内部の油本
体の温度より著しく高くなることがなく、コーキングが
発生することがない。１６は直胴部１４の上方位置に設
けられた排ガス抽出口１７を有し、この排ガスを燃焼室
１３への供給口１８に導入するためのダクトであって、
直胴部１４の上方からの約４５０℃の低温の燃焼排ガス
は、燃焼室１３に供給されることによって燃焼室内の温
度は６００℃を越えないように調整される。The heating furnace 10 includes a horizontal combustion chamber 13 having a refractory lining 12 provided with a burner 11 on one end surface.
And an L-shaped structure having a straight body 14 rising at the end of the combustion chamber 13. In the center of the combustion chamber 13,
A barrier pillar 15 formed by a plurality of refractory pillars is arranged to prevent a flame from a burner from directly reaching and prevent radiant heat from entering the straight body portion 14. The barrier column 15 also has a function of sufficiently circulating the combustion exhaust gas in the combustion chamber 13 and sufficiently mixing with the high-temperature burner flame so that the high-temperature gas is not partially biased. Further, a heating pipe 4 for introducing a mixture of molten plastics and pyrolysis oil and heating the straight body portion 14 is disposed.
The heating tube 4 has an allowable average heat transfer coefficient of 700 based on a bare tube.
It is formed as a heating tube designed to be 0 kcal / m 2 hr or less, and is disposed in the straight body portion 14. The heating pipe 4 is heated only by the convection of the high-temperature gas that has passed through the barrier column 15 of the combustion chamber, and the flame does not directly reach the heating pipe 4. It does not rise significantly above the temperature and no caulking occurs. A duct 16 has an exhaust gas extraction port 17 provided above the straight body portion 14, and is a duct for introducing the exhaust gas into a supply port 18 to the combustion chamber 13.
The combustion exhaust gas at a low temperature of about 450 ° C. from above the straight body portion 14 is supplied to the combustion chamber 13 so that the temperature in the combustion chamber does not exceed 600 ° C.
【００１４】[0014]
【発明の効果】本発明によって、常時熱分解油の加熱温
度を３６０℃〜４３０℃の範囲で運転しても、コーキン
グを発生することなく長期にわたって安定した操業が可
能となる。According to the present invention, stable operation can be performed for a long period of time without generating caulking even when the pyrolysis oil is constantly operated at a heating temperature of 360 ° C. to 430 ° C.
【図１】 本発明の加熱炉を適用したプラスチックス熱
分解装置の概要を示す。FIG. 1 shows an outline of a plastics pyrolysis apparatus to which a heating furnace of the present invention is applied.
【図２】 加熱炉の構造の詳細を示す。FIG. 2 shows details of the structure of a heating furnace.
１ 押出機 ２ 原料混合槽 ３ 熱分解槽 ４ 熱伝達用管体 １０ 加熱炉 １１ バーナ １２ 耐火物ライニング １３ 燃焼室 １４ 直胴部 １５ 障壁柱 １６ ダクト １７ 排ガス抽出口 １８ 排ガス供給口 DESCRIPTION OF SYMBOLS 1 Extruder 2 Raw material mixing tank 3 Pyrolysis tank 4 Heat transfer tube 10 Heating furnace 11 Burner 12 Refractory lining 13 Combustion chamber 14 Straight body part 15 Barrier column 16 Duct 17 Exhaust gas extraction port 18 Exhaust gas supply port
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 瑞穂 福岡県北九州市戸畑区大字中原46番地の 59 日鐵プラント設計株式会社内 (72)発明者 白水 渡 福岡県北九州市戸畑区大字中原46番地の 59 日鐵プラント設計株式会社内 (58)調査した分野(Int.Cl.6，ＤＢ名) C10G 1/10 ZAB B09B 3/00 B29B 17/00──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Mizuho Tanaka 46 Narahara, Ohara 46, Tobata-ku, Kitakyushu City, Fukuoka Prefecture (72) Wataru Shiramizu 46 Ohara Nakahara, Tobata-ku, Kitakyushu-shi, Fukuoka Prefecture (58) Field surveyed (Int. Cl. 6 , DB name) C10G 1/10 ZAB B09B 3/00 B29B 17/00
Claims (1)
と、同燃焼室から垂直に立ち上がった直胴部とを有する
Ｌ型構造をなし、前記燃焼室中央付近に複数の耐火物柱
を配置すると共に、前記直胴部に加熱管群を納めてな
り、且つ前記直胴部の上方から吸引した排ガスを前記燃
焼室のバーナ近傍に導入するための排ガス導入ダクトを
前記直胴部の上方から前記バーナ近傍の燃焼室にわたっ
て設けたプラスチックスの熱分解のための加熱炉。1. An L-shaped structure having a horizontal combustion chamber provided with a heating burner at an end thereof and a straight body vertically rising from the combustion chamber, wherein a plurality of refractory columns are provided near the center of the combustion chamber. And a heating pipe group housed in the straight body portion, and an exhaust gas introduction duct for introducing exhaust gas sucked from above the straight body portion near a burner of the combustion chamber of the straight body portion. A heating furnace for pyrolysis of plastics provided from above to a combustion chamber near the burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16300293A JP2863064B2 (en) | 1993-06-30 | 1993-06-30 | Heating furnace for pyrolysis of plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16300293A JP2863064B2 (en) | 1993-06-30 | 1993-06-30 | Heating furnace for pyrolysis of plastics |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0770566A JPH0770566A (en) | 1995-03-14 |
| JP2863064B2 true JP2863064B2 (en) | 1999-03-03 |
Family
ID=15765334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16300293A Expired - Fee Related JP2863064B2 (en) | 1993-06-30 | 1993-06-30 | Heating furnace for pyrolysis of plastics |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2863064B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4825813B2 (en) * | 2008-01-08 | 2011-11-30 | 株式会社東芝 | Heating furnace for waste plastic decomposition oil |
| JP2012532965A (en) * | 2009-07-15 | 2012-12-20 | 斌 牛 | Coking prevention process in waste rubber or waste plastic oil production, its equipment, and decoking mechanism of oil production equipment |
-
1993
- 1993-06-30 JP JP16300293A patent/JP2863064B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0770566A (en) | 1995-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI86985C (en) | ENERGY IMPROVEMENT FOER FAR INSPECTION OF GLASS OR GLASS MAINTENANCE FOR GENOMATION OF DIFFICULTURE | |
| JP5843423B2 (en) | Furnace with submerged burner and overhead burner | |
| KR100578773B1 (en) | Roof-mounted oxygen-fuel burner for a glass melting furnace and process of using the oxygen-fuel burner | |
| US11919798B2 (en) | Gradient fining tank for refining foamy molten glass and a method of using the same | |
| JPH05125367A (en) | Pyrolysis oven and method of pyrolysis | |
| TWI402229B (en) | Glass melting furnace and method for melting glasses | |
| JP2863064B2 (en) | Heating furnace for pyrolysis of plastics | |
| US2763476A (en) | Two stage combustion furnace | |
| JP3909088B2 (en) | Metal reduction and melting methods | |
| JP2022514196A (en) | Reactor and process for gasification and / or melting of feedstock | |
| US6629838B1 (en) | Endothermic heat treatment of solids loaded on trolleys moving in a kiln | |
| WO2014157466A1 (en) | Waste gasification and melting device and waste gasification and melting method | |
| US2255406A (en) | Coking retort oven | |
| CN102177115A (en) | Method and device for producing ethylenically unsaturated halogenated hydrocarbons | |
| JPS6134093A (en) | Method and apparatus for producing high quality calcined coke | |
| GB1028028A (en) | Thermal conversion process and apparatus therefor | |
| US20220396479A1 (en) | Method for pyrolytic decomposition of gaseous hydrocarbons and apparatus for performing the same | |
| CN102177114A (en) | Method and device for producing ethylenically unsaturated halogenated hydrocarbons | |
| JP4057401B2 (en) | Recycling furnace and combustion method thereof | |
| US245248A (en) | And annealing glass | |
| US1545154A (en) | Process for the operation of reverberatory furnaces | |
| FI89582B (en) | Glass melting furnace | |
| US1462540A (en) | Furnace | |
| US1806146A (en) | Apparatus and process for coking liquefiable carbonaceous materials | |
| US20100139537A1 (en) | Thermal oxidiser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19981106 |
|
| LAPS | Cancellation because of no payment of annual fees |