JPH09100475A - Effective utilization of blast furnace gas by using waste plastic - Google Patents
Effective utilization of blast furnace gas by using waste plasticInfo
- Publication number
- JPH09100475A JPH09100475A JP27616795A JP27616795A JPH09100475A JP H09100475 A JPH09100475 A JP H09100475A JP 27616795 A JP27616795 A JP 27616795A JP 27616795 A JP27616795 A JP 27616795A JP H09100475 A JPH09100475 A JP H09100475A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- blast furnace
- furnace
- waste plastic
- cracking
- 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
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Blast Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、製鉄所で発生する
高炉ガスの有効利用に関する。TECHNICAL FIELD The present invention relates to effective use of blast furnace gas generated in a steel mill.
【０００２】[0002]
【従来の技術】製鉄所の高炉から排出される高炉ガス中
にはＣＯ、ＣＨ4、Ｈ2の可燃性ガス成分を含有している
がこれらの含有比率は低いため発熱量が７００〜９００
Ｋｃａｌ／Ｎｍ3と低すぎて通常は廃棄されているが、
製鉄所内にコークス炉が設置されている場合は、そこで
発生するコークス炉ガスの発熱量は４５００〜３０００
Ｋｃａｌ／Ｎｍ3と高いため、コークス炉ガスと混合す
れば燃料として使用可能の１５００Ｋｃａｌ／Ｎｍ3以
上の発熱量に増大できるのでコークス炉ガスと混合して
燃料として使用していることもある。2. Description of the Related Art Blast furnace gas discharged from a blast furnace of a steel mill contains combustible gas components such as CO, CH 4 , and H 2 , but their content ratio is low, so that the calorific value is 700 to 900.
Kcal / Nm 3 is too low and is usually discarded,
When a coke oven is installed in the steel mill, the calorific value of the coke oven gas generated there is 4500 to 3000.
Since it is as high as Kcal / Nm 3, it can be increased to a calorific value of 1500 Kcal / Nm 3 or more that can be used as a fuel when mixed with a coke oven gas, so it may be used as a fuel after being mixed with a coke oven gas.
【０００３】[0003]
【発明が解決しようとする課題】コークス炉が製鉄所内
に設置されておれば高炉ガスにコークス炉ガスを混合さ
せて燃料として使用することは容易であるが、コークス
の生産コスト等の理由で製鉄所で使用するコークスは外
部から供給されるようになり、製鉄所内でのコークスの
生産を中止した場合はコークス炉ガスの供給が不可能と
なり高炉ガスにコークス炉ガスを混合して燃料として使
用することはできなくなる。それにコークス炉ガスは高
価である。本発明は、高価なコークス炉ガスを使用する
ことなく産業廃棄物として廃棄されている資源を活用し
て高炉ガスの発熱量を増大させる方法を提供することを
目的とするものである。If a coke oven is installed in a steel mill, it is easy to mix the blast furnace gas with the coke oven gas and use it as fuel, but due to the cost of coke production, etc. The coke used in the plant will be supplied from the outside, and if the production of coke in the steel mill is stopped, the coke oven gas cannot be supplied and the blast furnace gas is mixed with the coke oven gas and used as fuel. You can't do that. Besides, coke oven gas is expensive. It is an object of the present invention to provide a method for increasing the heat generation amount of blast furnace gas by utilizing resources discarded as industrial waste without using expensive coke oven gas.
【０００４】[0004]
【課題を解決するための手段】高炉からの高炉ガスを流
動層式熱分解炉１の底部に設けたガス噴射ノズル５から
該分解炉１内へ噴射させて該分解炉１内下部に充填せる
流動砂２を流動化させ、該分解炉１内へ供給される廃プ
ラスチックと撹拌させて該廃プラスチックを熱分解さ
せ、該廃プラスチックの分解ガスにより高炉ガスの発熱
量を増大させて高炉ガスを燃料として利用することを特
徴とする。A blast furnace gas from a blast furnace is injected into the cracking furnace 1 from a gas injection nozzle 5 provided at the bottom of the fluidized bed type pyrolysis furnace 1 to fill the lower part inside the cracking furnace 1. The fluidized sand 2 is fluidized and stirred with the waste plastic supplied into the decomposition furnace 1 to thermally decompose the waste plastic, and the decomposition gas of the waste plastic increases the heating value of the blast furnace gas to generate the blast furnace gas. It is characterized by being used as fuel.
【０００５】[0005]
【発明の実施の形態】次に、本発明の実施の形態につい
て図１を参照して説明する。図１は本発明方法を実施す
る装置のフローシートであって、１は流動層式分解炉
で、２は流動砂、３は廃プラスチックを炉内へ供給する
ためのスクリューコンベヤ、４は廃プラスチック貯槽、
５は前記分解炉１の底部に設けられたガス噴射ノズル、
６は分解炉１の側壁に設けた助燃バーナ、７は熱交換
器、８はルーツブロワである。Next, an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a flow sheet of an apparatus for carrying out the method of the present invention, wherein 1 is a fluidized bed type decomposition furnace, 2 is fluidized sand, 3 is a screw conveyor for supplying waste plastic into the furnace, and 4 is waste plastic. Storage tank,
5 is a gas injection nozzle provided at the bottom of the decomposition furnace 1,
6 is an auxiliary combustion burner provided on the side wall of the cracking furnace 1, 7 is a heat exchanger, and 8 is a roots blower.
【０００６】高炉からの高炉ガスはルーツブロワ８で１
５００〜２０００ｍｍ水柱圧力まで昇圧され（高炉ガス
のガス圧が高い場合はルーツブロワ８は不要である）、
熱交換器７で流動層式分解炉１からのガスと熱交換され
て３００〜４００℃に予熱されて前記分解炉１の底部の
ガス噴射ノズル５から炉内へ噴射される。すると炉１の
下部に充填されている流動砂２が吹き上げられ流動化が
起こる。一方、廃プラスチック貯槽４からチップ状に裁
断されている廃プラスチックをスクリューコンベヤ３に
より炉１内へ供給すると、前記流動砂２により撹拌され
ながら熱分解される。そして、該廃プラスチックの熱分
解ガスは炉頂から取り出されて熱交換器７で高炉ガスと
熱交換して系外へ排出される。The blast furnace gas from the blast furnace is 1 by the roots blower 8.
The pressure is increased to 500 to 2000 mm of water column pressure (the roots blower 8 is not necessary when the gas pressure of the blast furnace gas is high),
It is heat-exchanged with the gas from the fluidized bed type cracking furnace 1 in the heat exchanger 7, preheated to 300 to 400 ° C., and injected from the gas injection nozzle 5 at the bottom of the cracking furnace 1 into the furnace. Then, the fluidized sand 2 filled in the lower part of the furnace 1 is blown up and fluidization occurs. On the other hand, when the waste plastic cut into chips from the waste plastic storage tank 4 is fed into the furnace 1 by the screw conveyor 3, it is thermally decomposed while being stirred by the fluidized sand 2. Then, the pyrolysis gas of the waste plastic is taken out from the furnace top, exchanges heat with the blast furnace gas in the heat exchanger 7, and is discharged to the outside of the system.
【０００７】[0007]
【実施例】流動層式分解炉１へ供給される廃プラスチッ
クはポリエチレン１２００Ｋｇ／Ｈ、該分解炉１へ供給
される高炉ガスは８０００Ｎｍ3／Ｈであるとき、発熱
量が１６００Ｋｃａｌ／Ｎｍ3の分解ガス１００００Ｎ
ｍ3／Ｈが得られた。[Example] When the waste plastic supplied to the fluidized bed type decomposition furnace 1 is 1200 kg / H of polyethylene, and the blast furnace gas supplied to the decomposition furnace 1 is 8000 Nm 3 / H, the calorific value is 1600 Kcal / Nm 3 of decomposition. Gas 10000N
m 3 / H was obtained.
【０００８】しかして、上記廃プラスチック熱分解ガス
の発熱量は１５００〜２５００Ｋｃａｌ／Ｎｍ3と高カ
ロリーであるため、燃料として十分使用される。なお、
この分解ガスの一部を前記分解炉１の助燃バーナ６、６
の燃料として利用すると便利である。However, since the heat generation amount of the waste plastic pyrolysis gas is high calorie of 1500 to 2500 Kcal / Nm 3 , it is sufficiently used as a fuel. In addition,
A part of this decomposed gas is used as an auxiliary burner 6, 6 in the decomposition furnace 1.
It is convenient to use it as fuel.
【０００９】[0009]
【発明の効果】本発明によれば、産業廃棄物として投棄
または焼却されていた廃プラスチックを熱分解してガス
化し、これと、燃料としてはカロリーが低すぎて廃棄し
ていた高炉ガスを組み合わせることによりカロリーアッ
プが図れて、燃料として利用することができるので省エ
ネルギーとして極めて有効である。According to the present invention, waste plastic that has been dumped or incinerated as industrial waste is pyrolyzed and gasified, and this is combined with the blast furnace gas that has been discarded due to too low calories as fuel. As a result, calories can be increased and can be used as fuel, which is extremely effective as energy saving.
【図１】本発明方法を実施する装置のフローシート。FIG. 1 is a flow sheet of an apparatus for carrying out the method of the present invention.
【符号の説明】 １ 流動層式分解炉 ２ 流動砂 ３ スクリューコンベヤ ４ 廃プラスチック貯槽 ５ ガス噴射ノズル ６ 助燃バーナ ７ 熱交換器 ８ ルーツブロワ[Explanation of symbols] 1 fluidized bed type decomposition furnace 2 fluidized sand 3 screw conveyor 4 waste plastic storage tank 5 gas injection nozzle 6 auxiliary burner 7 heat exchanger 8 roots blower
Claims (3)
（１）の底部に設けたガス噴射ノズル（５）から該分解
炉（１）内へ噴射させて該分解炉（１）内下部に充填せ
る流動砂（２）を流動化させ、該分解炉（１）内へ供給
される廃プラスチックと撹拌させて該廃プラスチックを
熱分解させ、該廃プラスチックの分解ガスにより高炉ガ
スの発熱量を増大させて高炉ガスを燃料として利用する
ことを特徴とする廃プラスチックを利用した高炉ガスの
有効利用方法。1. A blast furnace gas from a blast furnace is injected into the cracking furnace (1) from a gas injection nozzle (5) provided at the bottom of the fluidized bed type pyrolysis furnace (1), and the inside of the cracking furnace (1) is injected. The fluidized sand (2) to be filled in the lower part is fluidized, stirred with the waste plastic supplied into the decomposition furnace (1) to thermally decompose the waste plastic, and the decomposition gas of the waste plastic heats the blast furnace gas. A method for effectively using blast furnace gas using waste plastic, characterized in that the amount of blast furnace gas is increased and used as fuel.
動層式熱分解炉（１）から取り出される廃プラスチック
分解ガスと熱交換されてガス噴射ノズルへ供給されるこ
とを特徴とする請求項１記載の廃プラスチックを利用し
た高炉ガスの有効利用方法。2. The blast furnace gas from the blast furnace according to claim 1 is heat-exchanged with waste plastic decomposition gas taken out from the fluidized bed type pyrolysis furnace (1) and supplied to a gas injection nozzle. A method for effectively using blast furnace gas using the waste plastic according to claim 1.
廃プラスチック分解ガスを該分解炉（１）の助燃バーナ
の燃料として利用することを特徴とする請求項１または
請求項２記載の廃プラスチックを利用した高炉ガスの有
効利用方法。3. A waste plastic cracking gas taken out from a fluidized bed type pyrolysis furnace (1) is used as a fuel for an auxiliary combustion burner of the cracking furnace (1). Effective use of blast furnace gas using waste plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27616795A JPH09100475A (en) | 1995-10-02 | 1995-10-02 | Effective utilization of blast furnace gas by using waste plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27616795A JPH09100475A (en) | 1995-10-02 | 1995-10-02 | Effective utilization of blast furnace gas by using waste plastic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09100475A true JPH09100475A (en) | 1997-04-15 |
Family
ID=17565670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27616795A Pending JPH09100475A (en) | 1995-10-02 | 1995-10-02 | Effective utilization of blast furnace gas by using waste plastic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09100475A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006206840A (en) * | 2005-01-31 | 2006-08-10 | Nippon Steel Corp | Integrated gasification furnace and its operation method |
| JP2012506955A (en) * | 2008-10-31 | 2012-03-22 | ポール ヴルス エス．エイ． | Blast furnace operating method and blast furnace equipment |
-
1995
- 1995-10-02 JP JP27616795A patent/JPH09100475A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006206840A (en) * | 2005-01-31 | 2006-08-10 | Nippon Steel Corp | Integrated gasification furnace and its operation method |
| JP4528145B2 (en) * | 2005-01-31 | 2010-08-18 | 新日鉄エンジニアリング株式会社 | Integrated gasifier and method of operation thereof |
| JP2012506955A (en) * | 2008-10-31 | 2012-03-22 | ポール ヴルス エス．エイ． | Blast furnace operating method and blast furnace equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2377774C (en) | A method and an apparatus for the pyrolysis and gasification of organic substances or mixtures of organic substances | |
| JP4112364B2 (en) | Small scale high throughput biomass gasification system and method | |
| FI74532C (en) | Procedure for waste disposal. | |
| CN101495603A (en) | Thermal revivification gasification method for generating hydrogen and electricity | |
| EP0952393B1 (en) | Method and apparatus for operating melting furnace in waste treatment facilities | |
| GB2422602A (en) | Combined gasification and plasma treatment of waste | |
| US20120210645A1 (en) | Multi-ring Plasma Pyrolysis Chamber | |
| CN1834535B (en) | Smokeless coal burning boiler | |
| CN101230281A (en) | Solid biomass semi-water coal-gas producer | |
| JP2018538502A (en) | Industrial furnace integrated with biomass gasification system | |
| US11130922B2 (en) | Hydrogen boiler based on coal gasification and water decomposition | |
| JPH09100475A (en) | Effective utilization of blast furnace gas by using waste plastic | |
| SK3693A3 (en) | Method and means for producing combustible gases from low grade solid fuel | |
| JP2001072446A (en) | Production of quick lime.calcined dolomite in kiln | |
| US6849160B2 (en) | Method and device for heat treatment of waste products | |
| CN206799531U (en) | A kind of moving bed solid waste segmented pyrolysis gasification system | |
| JP2002155289A (en) | Gas-flowing bed type method for gasifying coal | |
| JP2006299675A (en) | Asphalt plant using combustible gas generated from biomass | |
| CN109135839A (en) | High-efficiency environment friendly fixed-end forces crack gasification installation | |
| CN113980705B (en) | Tar-free low-temperature gasification system and method | |
| Leonchik et al. | Two-Stage Processing of a Material with Predominant Combustible Matter | |
| WO2023044858A1 (en) | High-temperature clean gasification apparatus and method for achieving high carbon conversion rate of carbonaceous material | |
| CN209024469U (en) | High-efficiency environment friendly fixed-end forces crack gasification installation | |
| SU1772524A1 (en) | Method of burning solid fuel in layer | |
| RU2705067C1 (en) | Low-reaction solid fuel gasification unit |